ios: add /platform event channel

ios/Runner/Handlers/PlatformMethodHandler.swift

@@ -0,0 +1,41 @@
+//
+//  PlatformMethodHandler.swift
+//  Runner
+//
+//  Created by Hiddify on 12/27/23.
+//
+
+import Flutter
+import Combine
+import Libcore
+
+public class PlatformMethodHandler: NSObject, FlutterPlugin {
+        
+    public static let name = "\(Bundle.main.serviceIdentifier)/platform"
+    
+    public static func register(with registrar: FlutterPluginRegistrar) {
+        let channel = FlutterMethodChannel(name: Self.name, binaryMessenger: registrar.messenger())
+        let instance = PlatformMethodHandler()
+        registrar.addMethodCallDelegate(instance, channel: channel)
+        instance.channel = channel
+    }
+    
+    private var channel: FlutterMethodChannel?
+    
+    public func handle(_ call: FlutterMethodCall, result: @escaping FlutterResult) {
+        switch call.method {
+        case "get_paths":
+            result(getPaths(args: call.arguments))
+        default:
+            result(FlutterMethodNotImplemented)
+        }
+    }
+    
+    public func getPaths(args: Any?) -> [String:String] {
+        return [
+            "base": FilePath.sharedDirectory.path,
+            "working": FilePath.workingDirectory.path,
+            "temp": FilePath.cacheDirectory.path
+        ]
+    }
+}