add livekit-ffi generate proto script in windows (#494)

livekit-ffi/generate_proto_win.bat

@@ -0,0 +1,33 @@
+@echo off
+
+rem Copyright 2023 LiveKit, Inc.
+rem
+rem Licensed under the Apache License, Version 2.0 (the "License");
+rem you may not use this file except in compliance with the License.
+rem You may obtain a copy of the License at
+rem
+rem     http://www.apache.org/licenses/LICENSE-2.0
+rem
+rem Unless required by applicable law or agreed to in writing, software
+rem distributed under the License is distributed on an "AS IS" BASIS,
+rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+rem See the License for the specific language governing permissions and
+rem limitations under the License.
+
+set PROTOCOL=protocol
+set OUT_RUST=src
+
+protoc.exe ^
+    -I=%PROTOCOL% ^
+    --prost_out=%OUT_RUST% ^
+    %PROTOCOL%/ffi.proto ^
+    %PROTOCOL%/handle.proto ^
+    %PROTOCOL%/room.proto ^
+    %PROTOCOL%/track.proto ^
+    %PROTOCOL%/track_publication.proto ^
+    %PROTOCOL%/participant.proto ^
+    %PROTOCOL%/video_frame.proto ^
+    %PROTOCOL%/audio_frame.proto ^
+    %PROTOCOL%/e2ee.proto ^
+    %PROTOCOL%/stats.proto ^
+    %PROTOCOL%/rpc.proto