refactor: separate proto file from src folder

frontend/rust-lib/flowy-net/Flowy.toml

@@ -1,2 +1,4 @@
 proto_crates = ["src/event_map.rs", "src/entities"]
+proto_output_dir = "resources/proto"
+protobuf_crate_path = "src/protobuf"
 event_files = ["src/event_map.rs"]

frontend/rust-lib/flowy-net/build.rs

@@ -2,7 +2,7 @@ use lib_infra::code_gen;
 
 fn main() {
     let crate_name = env!("CARGO_PKG_NAME");
-    code_gen::protobuf_file::gen(crate_name, "./src/protobuf/proto");
+    code_gen::protobuf_file::gen(crate_name);
 
     #[cfg(feature = "dart")]
     code_gen::dart_event::gen(crate_name);