Integrate permission defines from previous SPM work

- Add environment variable-based permission defines (PERMISSION_CAMERA, etc.)
- Allow consumers to selectively enable only needed permissions
- Default all permissions to 0 (disabled) for minimal footprint
- Keep essential header search paths
- Simplified structure without unnecessary framework dependencies

Based on approach from Baseflow#1440

Author: ened

permission_handler_apple/ios/permission_handler_apple/Package.swift

@@ -1,6 +1,27 @@
 // swift-tools-version: 5.9
 import PackageDescription
 
+let environmentVariables = ProcessInfo.processInfo.environment
+
+let permissionDefines: [CSetting] = [
+    .define("PERMISSION_EVENTS", to: environmentVariables["PERMISSION_EVENTS"] ?? "0"),
+    .define("PERMISSION_EVENTS_FULL_ACCESS", to: environmentVariables["PERMISSION_EVENTS_FULL_ACCESS"] ?? "0"),
+    .define("PERMISSION_REMINDERS", to: environmentVariables["PERMISSION_REMINDERS"] ?? "0"),
+    .define("PERMISSION_CONTACTS", to: environmentVariables["PERMISSION_CONTACTS"] ?? "0"),
+    .define("PERMISSION_CAMERA", to: environmentVariables["PERMISSION_CAMERA"] ?? "0"),
+    .define("PERMISSION_MICROPHONE", to: environmentVariables["PERMISSION_MICROPHONE"] ?? "0"),
+    .define("PERMISSION_SPEECH_RECOGNIZER", to: environmentVariables["PERMISSION_SPEECH_RECOGNIZER"] ?? "0"),
+    .define("PERMISSION_PHOTOS", to: environmentVariables["PERMISSION_PHOTOS"] ?? "0"),
+    .define("PERMISSION_LOCATION", to: environmentVariables["PERMISSION_LOCATION"] ?? "0"),
+    .define("PERMISSION_LOCATION_WHENINUSE", to: environmentVariables["PERMISSION_LOCATION_WHENINUSE"] ?? "0"),
+    .define("PERMISSION_NOTIFICATIONS", to: environmentVariables["PERMISSION_NOTIFICATIONS"] ?? "0"),
+    .define("PERMISSION_MEDIA_LIBRARY", to: environmentVariables["PERMISSION_MEDIA_LIBRARY"] ?? "0"),
+    .define("PERMISSION_SENSORS", to: environmentVariables["PERMISSION_SENSORS"] ?? "0"),
+    .define("PERMISSION_BLUETOOTH", to: environmentVariables["PERMISSION_BLUETOOTH"] ?? "0"),
+    .define("PERMISSION_APP_TRACKING_TRANSPARENCY", to: environmentVariables["PERMISSION_APP_TRACKING_TRANSPARENCY"] ?? "0"),
+    .define("PERMISSION_CRITICAL_ALERTS", to: environmentVariables["PERMISSION_CRITICAL_ALERTS"] ?? "0")
+]
+
 let package = Package(
     name: "permission-handler-apple",
     platforms: [
@@ -23,16 +44,8 @@ let package = Package(
             publicHeadersPath: "include",
             cSettings: [
                 .headerSearchPath("include"),
-                .headerSearchPath("include/permission_handler_apple"),
-                .define("PERMISSION_HANDLER_APPLE", to: "1")
-            ],
-            cxxSettings: [
-                .headerSearchPath("include")
-            ],
-            linkerSettings: [
-                .linkedFramework("UIKit", .when(platforms: [.iOS])),
-                .linkedFramework("Foundation")
-            ]
+                .headerSearchPath("include/permission_handler_apple")
+            ] + permissionDefines
         ),
     ]
 )