feat: add separate logger channel for outgoing log calls

- Define LOGGER_CHANNEL constant for OptimizelyFlutterLogger class
- Set up separate FlutterMethodChannel for outgoing log calls
- Update SwiftOptimizelyFlutterSdkPlugin to use the new logger channel

Author: muzahidul-opti

ios/Classes/OptimizelyFlutterLogger.swift

@@ -2,6 +2,8 @@ import Flutter
 import Optimizely
 
 public class OptimizelyFlutterLogger: NSObject, OPTLogger {
+    static var LOGGER_CHANNEL: String = "optimizely_flutter_sdk_logger";
+    
     public static var logLevel: OptimizelyLogLevel = .info
 
     private static var loggerChannel: FlutterMethodChannel?

ios/Classes/SwiftOptimizelyFlutterSdkPlugin.swift

@@ -43,6 +43,10 @@ public class SwiftOptimizelyFlutterSdkPlugin: NSObject, FlutterPlugin {
         channel = FlutterMethodChannel(name: "optimizely_flutter_sdk", binaryMessenger: registrar.messenger())
         let instance = SwiftOptimizelyFlutterSdkPlugin()
         registrar.addMethodCallDelegate(instance, channel: channel)
+
+        // Separate logger channel for outgoing log calls
+        let loggerChannel = FlutterMethodChannel(name: OptimizelyFlutterLogger.LOGGER_CHANNEL, binaryMessenger: registrar.messenger())
+        OptimizelyFlutterLogger.setChannel(loggerChannel)
     }
 
     /// Part of FlutterPlugin protocol to handle communication with flutter sdk