add veilid flutter plugin skeleton

veilid-flutter/ios/Classes/SwiftVeilidPlugin.swift

@@ -0,0 +1,14 @@
+import Flutter
+import UIKit
+
+public class SwiftVeilidPlugin: NSObject, FlutterPlugin {
+  public static func register(with registrar: FlutterPluginRegistrar) {
+    let channel = FlutterMethodChannel(name: "veilid", binaryMessenger: registrar.messenger())
+    let instance = SwiftVeilidPlugin()
+    registrar.addMethodCallDelegate(instance, channel: channel)
+  }
+
+  public func handle(_ call: FlutterMethodCall, result: @escaping FlutterResult) {
+    result("iOS " + UIDevice.current.systemVersion)
+  }
+}

veilid-flutter/ios/Classes/VeilidPlugin.h

@@ -0,0 +1,4 @@
+#import <Flutter/Flutter.h>
+
+@interface VeilidPlugin : NSObject<FlutterPlugin>
+@end

veilid-flutter/ios/Classes/VeilidPlugin.m

@@ -0,0 +1,15 @@
+#import "VeilidPlugin.h"
+#if __has_include(<veilid/veilid-Swift.h>)
+#import <veilid/veilid-Swift.h>
+#else
+// Support project import fallback if the generated compatibility header
+// is not copied when this plugin is created as a library.
+// https://forums.swift.org/t/swift-static-libraries-dont-copy-generated-objective-c-header/19816
+#import "veilid-Swift.h"
+#endif
+
+@implementation VeilidPlugin
++ (void)registerWithRegistrar:(NSObject<FlutterPluginRegistrar>*)registrar {
+  [SwiftVeilidPlugin registerWithRegistrar:registrar];
+}
+@end