docs: standardize array type syntax to Type[] format (ja, ko)

Replace Array<Type> with Type[] shorthand syntax throughout
Japanese and Korean documentation for consistency.

Exceptions preserved:
- Hash<K, V> types unchanged
- Type alias names (ReadonlyArray<T>, IsArray<T>)
- Generic syntax explanation tables
- Constructor syntax (Array<User>.new)

Author: yhk1038

docs/project/changelog.md

@@ -63,8 +63,8 @@ trc run hello.trb
 ```trb
 # Array shorthand syntax
 def process(items: String[]): Integer[][]
-  # items is Array<String>
-  # returns Array<Array<Integer>>
+  # items is String[]
+  # returns Integer[][]
 end
 
 # Equivalent to

i18n/ja/docusaurus-plugin-content-docs/current/cli/compiler-options.md

@@ -39,7 +39,7 @@ trc compile --strict src/
 
 ```trb
 # 厳格モードでは完全な型指定が必要
-def process(data: Array<String>): Hash<String, Integer>
+def process(data: String[]): Hash<String, Integer>
   @count: Integer = 0
   result: Hash<String, Integer> = {}
   result
@@ -138,7 +138,7 @@ trc compile --no-unchecked-indexed-access src/
 
 ```trb
 # --no-unchecked-indexed-access使用時はエラー
-users: Array<User> = get_users()
+users: User[] = get_users()
 user = users[0]  # エラー: nilの可能性あり
 
 # まず検査が必要

i18n/ja/docusaurus-plugin-content-docs/current/cli/configuration.md

@@ -256,7 +256,7 @@ compiler:
 
 ```trb
 # 厳格モードで必要
-def process(data: Array<String>): Hash<String, Integer>
+def process(data: String[]): Hash<String, Integer>
   @count: Integer = 0
   result: Hash<String, Integer> = {}
   # ...
@@ -272,7 +272,7 @@ end
 
 ```trb
 # 標準モードでOK
-def process(data: Array<String>): Hash<String, Integer>
+def process(data: String[]): Hash<String, Integer>
   @count: Integer = 0
   result = {}  # 型を推論
   # ...
@@ -412,7 +412,7 @@ end
 
 ```trb
 # no_unchecked_indexed_access: trueの場合エラー
-users: Array<User> = get_users()
+users: User[] = get_users()
 user = users[0]  # エラー: nilの可能性あり
 
 # OK - まず検査

i18n/ja/docusaurus-plugin-content-docs/current/getting-started/quick-start.md

@@ -82,7 +82,7 @@ is_active: Boolean = true
 role: Symbol = :admin
 
 # コレクション
-numbers: Array<Integer> = [1, 2, 3, 4, 5]
+numbers: Integer[] = [1, 2, 3, 4, 5]
 scores: Hash<String, Integer> = { "数学" => 100, "英語" => 95 }
 
 # Nil許容（オプショナル）

i18n/ja/docusaurus-plugin-content-docs/current/getting-started/understanding-trb-files.md

@@ -134,7 +134,7 @@ Calculatorクラスを作成しましょう：
 ```trb title="calculator.trb"
 class Calculator
   # 型アノテーション付きインスタンス変数
-  @history: Array<String>
+  @history: String[]
 
   def initialize: void
     @history = []
@@ -168,7 +168,7 @@ class Calculator
     result
   end
 
-  def history: Array<String>
+  def history: String[]
     @history.dup
   end
 
@@ -272,7 +272,7 @@ def find(id: Integer): User?  # 短縮形
 ### ブロックパラメータ
 
 ```rbs
-def each_item(items: Array<String>, &block: (String) -> void): void
+def each_item(items: String[], &block: (String) -> void): void
   items.each(&block)
 end
 
@@ -314,7 +314,7 @@ Error: calculator.trb:2:15
 
 1. **パブリックAPIから始める** - パブリックメソッドに最初に型を付ける
 2. **型エイリアスを使用** - 複雑な型を読みやすくする
-3. **具体的な型を優先** - `Array`より`Array<String>`
+3. **具体的な型を優先** - `Array`より`String[]`
 4. **型でドキュメント化** - 型はドキュメントとして機能する
 
 ## 次のステップ

i18n/ja/docusaurus-plugin-content-docs/current/introduction/t-ruby-vs-others.md

@@ -128,7 +128,7 @@ class Calculator
     a + b
   end
 
-  def join(items: Array<String>): String
+  def join(items: String[]): String
     items.join(", ")
   end
 end

i18n/ja/docusaurus-plugin-content-docs/current/introduction/what-is-t-ruby.md

@@ -52,7 +52,7 @@ id: String | Integer = "user-123"
 name: String? = nil
 
 # ジェネリクス
-users: Array<User> = []
+users: User[] = []
 
 # インターフェース
 interface Printable

i18n/ja/docusaurus-plugin-content-docs/current/introduction/why-t-ruby.md

@@ -72,7 +72,7 @@ def transform(data, options = {})
 end
 
 # 型あり - 明確
-def transform(data: Array<Record>, options: TransformOptions?): TransformResult
+def transform(data: Record[], options: TransformOptions?): TransformResult
   # ...
 end
 ```
@@ -148,7 +148,7 @@ T-Rubyは特に以下の場合に価値があります：
 puts "Hello, #{ARGV[0]}!"
 
 # これは不要：
-# def main(args: Array<String>): void
+# def main(args: String[]): void
 #   puts "Hello, #{args[0]}!"
 # end
 ```

i18n/ja/docusaurus-plugin-content-docs/current/learn/advanced/intersection-types.md

@@ -162,7 +162,7 @@ end
 
 interface Validatable
   def valid?: Boolean
-  def errors: Array<String>
+  def errors: String[]
 end
 
 interface Persistable
@@ -179,7 +179,7 @@ class Article
 
   @title: String
   @content: String
-  @errors: Array<String>
+  @errors: String[]
 
   def initialize(title: String, content: String): void
     @title = title
@@ -203,7 +203,7 @@ class Article
     @errors.empty?
   end
 
-  def errors: Array<String>
+  def errors: String[]
     @errors
   end
 
@@ -248,7 +248,7 @@ type BaseEntity = Identifiable & Timestamped
 type DeletableEntity = Identifiable & Timestamped & SoftDeletable
 
 class Repository<T: BaseEntity>
-  @items: Array<T>
+  @items: T[]
 
   def initialize: void
     @items = []
@@ -258,25 +258,25 @@ class Repository<T: BaseEntity>
     @items.find { |item| item.id == id }
   end
 
-  def all: Array<T>
+  def all: T[]
     @items.dup
   end
 
-  def recent(limit: Integer = 10): Array<T>
+  def recent(limit: Integer = 10): T[]
     @items.sort_by { |item| item.created_at }.reverse.take(limit)
   end
 end
 
 class SoftDeleteRepository<T: DeletableEntity> < Repository<T>
-  def all: Array<T>
+  def all: T[]
     @items.reject { |item| item.deleted? }
   end
 
-  def with_deleted: Array<T>
+  def with_deleted: T[]
     @items.dup
   end
 
-  def only_deleted: Array<T>
+  def only_deleted: T[]
     @items.select { |item| item.deleted? }
   end
 end
@@ -428,7 +428,7 @@ end
 
 # 複数の機能を必要とするコレクション
 class ValidatedCollection<T: Identifiable & Validatable>
-  @items: Array<T>
+  @items: T[]
 
   def initialize: void
     @items = []
@@ -447,11 +447,11 @@ class ValidatedCollection<T: Identifiable & Validatable>
     @items.find { |item| item.id == id }
   end
 
-  def all_valid: Array<T>
+  def all_valid: T[]
     @items.select { |item| item.valid? }
   end
 
-  def all_invalid: Array<T>
+  def all_invalid: T[]
     @items.reject { |item| item.valid? }
   end
 end
@@ -638,7 +638,7 @@ class FormBuilder
   implements Buildable, Validatable, Resettable
 
   @fields: Hash<String, String>
-  @errors: Array<String>
+  @errors: String[]
 
   def initialize: void
     @fields = {}
@@ -690,9 +690,9 @@ class WorkflowState
   implements State, Transitionable, Observable
 
   @name: String
-  @allowed_transitions: Array<String>
+  @allowed_transitions: String[]
 
-  def initialize(name: String, allowed_transitions: Array<String>): void
+  def initialize(name: String, allowed_transitions: String[]): void
     @name = name
     @allowed_transitions = allowed_transitions
   end

i18n/ja/docusaurus-plugin-content-docs/current/learn/basics/basic-types.md

@@ -175,7 +175,7 @@ speed_of_light: Float = 2.998e8  # 299,800,000
 ### Float算術
 
 ```trb title="float_math.trb"
-def calculate_average(values: Array<Float>): Float
+def calculate_average(values: Float[]): Float
   sum = 0.0
   values.each do |v|
     sum += v