refactor(platform): run all codegen and format in 1 script

Author: uxduck

push_macos/macos/Classes/serialization/PushApi.swift

@@ -1,6 +1,6 @@
 import 'package:pigeon/pigeon.dart';
 
-// Regenerate the output files by running `dart run pigeon --input pigeons/push_api.dart`
+// Regenerate the output files with `./scripts/codegen.sh`
 @ConfigurePigeon(PigeonOptions(
   dartOut: '../push_platform_interface/lib/src/serialization/push_api.dart',
   dartTestOut: '../push_platform_interface/test/push_api_test.dart',

push_platform_interface/pigeons/push_api.dart

@@ -0,0 +1,8 @@
+#!/bin/zsh
+set -eu
+
+pushd push_platform_interface
+dart run pigeon --input pigeons/push_api.dart
+dart run pigeon --input pigeons/push_api.dart --swift_out ../push_macos/macos/Classes/serialization/PushApi.swift
+popd
+./scripts/format.sh