Convert support field to object with state and description

Change 'support' in all 85 JSON files from a plain string to an object
with 'state' (available/preview/experimental) and 'description' fields.
The JDK Support badge now dynamically shows Available, Preview, or
Experimental with appropriate color styling.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: brunoborges

.github/copilot-instructions.md

@@ -71,7 +71,10 @@ Each `content/category/slug.json` file has this structure:
     { "icon": "👁", "title": "Short title", "desc": "One sentence." },
     { "icon": "🔒", "title": "Short title", "desc": "One sentence." }
   ],
-  "support": "Widely available since JDK 10 (March 2018)",
+  "support": {
+    "state": "available",
+    "description": "Widely available since JDK 10 (March 2018)"
+  },
   "prev": "category/slug-of-previous",
   "next": "category/slug-of-next",
   "related": [

content/collections/collectors-teeing.json

@@ -30,7 +30,10 @@
       "desc": "Merge into a record or value object directly."
     }
   ],
-  "support": "Widely available since JDK 12 (March 2019)",
+  "support": {
+    "state": "available",
+    "description": "Widely available since JDK 12 (March 2019)"
+  },
   "prev": "collections/sequenced-collections",
   "next": "collections/stream-toarray-typed",
   "related": [

content/collections/copying-collections-immutably.json

@@ -30,7 +30,10 @@
       "desc": "Changes to the original don't affect the copy."
     }
   ],
-  "support": "Widely available since JDK 10 (March 2018)",
+  "support": {
+    "state": "available",
+    "description": "Widely available since JDK 10 (March 2018)"
+  },
   "prev": "collections/immutable-set-creation",
   "next": "collections/map-entry-factory",
   "related": [

content/collections/immutable-list-creation.json

@@ -30,7 +30,10 @@
       "desc": "Rejects null elements at creation time, failing fast."
     }
   ],
-  "support": "Widely available since JDK 9 (Sept 2017)",
+  "support": {
+    "state": "available",
+    "description": "Widely available since JDK 9 (Sept 2017)"
+  },
   "prev": "language/exhaustive-switch",
   "next": "collections/immutable-map-creation",
   "related": [

content/collections/immutable-map-creation.json

@@ -30,7 +30,10 @@
       "desc": "Null entries are rejected immediately."
     }
   ],
-  "support": "Widely available since JDK 9 (Sept 2017)",
+  "support": {
+    "state": "available",
+    "description": "Widely available since JDK 9 (Sept 2017)"
+  },
   "prev": "collections/immutable-list-creation",
   "next": "collections/immutable-set-creation",
   "related": [

content/collections/immutable-set-creation.json

@@ -30,7 +30,10 @@
       "desc": "No add/remove possible after creation."
     }
   ],
-  "support": "Widely available since JDK 9 (Sept 2017)",
+  "support": {
+    "state": "available",
+    "description": "Widely available since JDK 9 (Sept 2017)"
+  },
   "prev": "collections/immutable-map-creation",
   "next": "collections/copying-collections-immutably",
   "related": [

content/collections/map-entry-factory.json

@@ -30,7 +30,10 @@
       "desc": "Works perfectly with Map.ofEntries() for large maps."
     }
   ],
-  "support": "Widely available since JDK 9 (Sept 2017)",
+  "support": {
+    "state": "available",
+    "description": "Widely available since JDK 9 (Sept 2017)"
+  },
   "prev": "collections/copying-collections-immutably",
   "next": "collections/sequenced-collections",
   "related": [

content/collections/sequenced-collections.json

@@ -30,7 +30,10 @@
       "desc": "Works the same on List, Deque, SortedSet."
     }
   ],
-  "support": "Widely available since JDK 21 LTS (Sept 2023)",
+  "support": {
+    "state": "available",
+    "description": "Widely available since JDK 21 LTS (Sept 2023)"
+  },
   "prev": "collections/map-entry-factory",
   "next": "collections/collectors-teeing",
   "related": [

content/collections/stream-toarray-typed.json

@@ -30,7 +30,10 @@
       "desc": "One expression replaces the manual loop."
     }
   ],
-  "support": "Widely available since JDK 8 (March 2014)",
+  "support": {
+    "state": "available",
+    "description": "Widely available since JDK 8 (March 2014)"
+  },
   "prev": "collections/collectors-teeing",
   "next": "collections/unmodifiable-collectors",
   "related": [

content/collections/unmodifiable-collectors.json

@@ -30,7 +30,10 @@
       "desc": "Rejects null elements during collection."
     }
   ],
-  "support": "Widely available since JDK 10 (March 2018)",
+  "support": {
+    "state": "available",
+    "description": "Widely available since JDK 10 (March 2018)"
+  },
   "prev": "collections/stream-toarray-typed",
   "next": "strings/string-isblank",
   "related": [