fix: compile error when using enum in flutter

libs/flutter_rust_bridge_codegen/Cargo.toml

@@ -0,0 +1,37 @@
+[package]
+name = "flutter_rust_bridge_codegen"
+version = "1.32.0"
+edition = "2018"
+description = "High-level memory-safe bindgen for Dart/Flutter <-> Rust"
+license = "MIT"
+repository = "https://github.com/fzyzcjy/flutter_rust_bridge"
+keywords = ["flutter", "dart", "ffi", "code-generation", "bindings"]
+categories = ["development-tools::ffi"]
+
+[lib]
+name = "lib_flutter_rust_bridge_codegen"
+path = "src/lib.rs"
+
+[[bin]]
+name = "flutter_rust_bridge_codegen"
+path = "src/main.rs"
+
+[dependencies]
+syn = { version = "1.0.77", features = ["full", "extra-traits"] }
+quote = "1.0"
+regex = "1.5.4"
+lazy_static = "1.4.0"
+convert_case = "0.5.0"
+tempfile = "3.2.0"
+serde = { version = "1.0", features = ["derive"] }
+serde_yaml = "0.8"
+log = "0.4"
+env_logger = "0.9.0"
+structopt = "0.3"
+toml = "0.5.8"
+anyhow = "1.0.44"
+pathdiff = "0.2.1"
+cargo_metadata = "0.14.1"
+enum_dispatch = "0.3.8"
+thiserror = "1"
+cbindgen = "0.23"