Upgrade to flutter_rust_bridge V2

pubspec.yaml

@@ -55,7 +55,7 @@ dependencies:
   flutter_tilt: ^2.0.10
   card_swiper: ^3.0.1
   ffi: ^2.1.0
-  flutter_rust_bridge: ^1.82.3
+  flutter_rust_bridge: 2.0.0-dev.23
   freezed_annotation: ^2.4.1
   meta: ^1.9.1
   win32: ^5.0.9
@@ -70,6 +70,8 @@ dependencies:
   fixnum: ^1.1.0
   protobuf: ^3.1.0
   grpc: ^3.2.4
+  rust_builder:
+    path: rust_builder
 
 dependency_overrides:
   http: ^1.1.2
@@ -85,7 +87,6 @@ dev_dependencies:
   # rules and activating additional ones.
   flutter_lints: ^3.0.0
   msix: ^3.16.4
-  ffigen: ^11.0.0
   build_runner: ^2.4.6
   freezed: ^2.4.5