feat: add ios build support

cli/commands/build/ios.dart

@@ -0,0 +1,29 @@
+import 'dart:async';
+
+import 'package:args/command_runner.dart';
+import 'package:path/path.dart';
+
+import '../../core/env.dart';
+import 'common.dart';
+
+class IosBuildCommand extends Command with BuildCommandCommonSteps {
+  @override
+  String get description => "iOS build command";
+
+  @override
+  String get name => "ios";
+
+  @override
+  FutureOr? run() async {
+    await bootstrap();
+
+    final buildDirPath = join(cwd.path, "build", "ios", "iphoneos");
+    await shell.run(
+      """
+      flutter build ios --release --no-codesign --flavor ${CliEnv.channel}
+      ln -sf $buildDirPath Payload
+      zip -r9 Spotube-iOS.ipa ${join("Payload", "${CliEnv.channel}.app")}
+      """,
+    );
+  }
+}