chore: Firebase 의존성을 SPM 미러 저장소로 변경

Projects/App/Project.swift

@@ -43,7 +43,6 @@ private let commonDependencies: [TargetDependency] = [
     .external(dependency: .KakaoSDKAuth),
     .external(dependency: .KakaoSDKCommon),
     .external(dependency: .GoogleSignIn),
-    .external(dependency: .FirebaseCore),
     .external(dependency: .FirebaseMessaging),
     .external(dependency: .FirebaseRemoteConfig),
     .core(implements: .crashlytics)

Projects/Domain/Auth/Project.swift

@@ -23,8 +23,7 @@ let project = Project.makeModule(
                     .external(dependency: .KakaoSDKCommon),
                     .external(dependency: .KakaoSDKAuth),
                     .external(dependency: .KakaoSDKUser),
-                    .external(dependency: .GoogleSignIn),
-                    .external(dependency: .GoogleSignInSwift)
+                    .external(dependency: .GoogleSignIn)
                 ]
             )
         ),

Tuist/Package.swift

@@ -9,21 +9,24 @@ import PackageDescription
             "ComposableArchitecture": .framework,
             "Kingfisher": .framework,
             "Pulse": .framework,
-            "KakaoSDK": .staticLibrary,
-            "GoogleSignIn": .staticLibrary,
-            "GoogleSignInSwift": .staticLibrary
+            "KakaoSDK": .staticLibrary
         ]
     )
 #endif
 
+// Firebase / GoogleSignIn은 akaffenberger 미러를 통해 prebuilt xcframework로 통합한다.
+// 미러는 Firebase 공식 zip을 SPM `binaryTarget`으로 재포장한 것으로, Firebase가
+// 의존하는 GoogleUtilities/Promises 등을 동일 패키지가 함께 제공하기 때문에
+// 다른 SPM 경로(예: google/GoogleSignIn-iOS의 transitive deps)와의 sub-framework
+// 분할 충돌을 구조적으로 피한다. 따라서 GoogleSignIn도 같은 미러의 product를 사용한다.
+// 버전은 미러의 release tag(= Firebase 공식 버전)와 일치한다.
 let package = Package(
     name: "Twix",
     dependencies: [
         .package(url: "https://github.com/pointfreeco/swift-composable-architecture", from: "1.23.2"),
         .package(url: "https://github.com/onevcat/Kingfisher", from: "8.0.0"),
         .package(url: "https://github.com/kean/Pulse", from: "5.1.4"),
         .package(url: "https://github.com/kakao/kakao-ios-sdk", from: "2.27.1"),
-        .package(url: "https://github.com/google/GoogleSignIn-iOS", from: "9.1.0"),
-        .package(url: "https://github.com/firebase/firebase-ios-sdk", from: "12.13.0")
+        .package(url: "https://github.com/akaffenberger/firebase-ios-sdk-xcframeworks", from: "12.13.0")
     ]
 )

Tuist/ProjectDescriptionHelpers/Scripts/CrashlyticsScript.swift

@@ -21,9 +21,9 @@ public extension TargetScript {
             exit 0
         fi
 
-        UPLOAD_SYMBOLS="$SRCROOT/../../Tuist/.build/checkouts/firebase-ios-sdk/Crashlytics/upload-symbols"
+        UPLOAD_SYMBOLS="$SRCROOT/../../Tuist/.build/checkouts/firebase-ios-sdk-xcframeworks/Sources/FirebaseCrashlytics/upload-symbols"
         if [ ! -x "$UPLOAD_SYMBOLS" ]; then
-            UPLOAD_SYMBOLS=$(find "$SRCROOT/../.." -maxdepth 6 -name "upload-symbols" -path "*/firebase-ios-sdk/Crashlytics/*" 2>/dev/null | head -1)
+            UPLOAD_SYMBOLS=$(find "$SRCROOT/../.." -maxdepth 8 -name "upload-symbols" -path "*/FirebaseCrashlytics/*" 2>/dev/null | head -1)
         fi
         if [ -z "$UPLOAD_SYMBOLS" ] || [ ! -x "$UPLOAD_SYMBOLS" ]; then
             echo "warning: Firebase Crashlytics upload-symbols not found. Run 'tuist install'."

Tuist/ProjectDescriptionHelpers/Target/Dependency/TargetDependency+External.swift

@@ -16,14 +16,15 @@ public extension TargetDependency {
     /// 각 case는 SPM 패키지를 나타내며,
     /// `TargetDependency.external(dependency:)`와 유기적으로 사용됩니다.
     enum External: String {
+        // Firebase: akaffenberger 미러는 product 단위로 노출하며 FirebaseCore는
+        // 별도 product가 아닌 다른 Firebase product의 transitive 의존성으로 포함된다.
+        // 따라서 FirebaseCore는 enum에 두지 않는다.
         case FirebaseAnalytics
-        case FirebaseCore
         case FirebaseMessaging
         case FirebaseRemoteConfig
         case FirebaseCrashlytics
-        
+
         case GoogleSignIn
-        case GoogleSignInSwift
 
         case KakaoSDKCommon
         case KakaoSDKAuth