feat(useragent): initial connection impl

useragent/pubspec.yaml

@@ -22,6 +22,7 @@ dependencies:
     hosted: https://git.markettakers.org/api/packages/MarketTakers/pub/
     version: ^1.0.6
   cryptography: ^2.9.0
+  crypto: ^3.0.6
   flutter_secure_storage: ^10.0.0
   cryptography_flutter: ^2.3.4
   riverpod_annotation: ^4.0.0
@@ -30,6 +31,8 @@ dependencies:
   flutter_hooks: ^0.21.3+1
   auto_route: ^11.1.0
   protobuf: ^6.0.0
+  freezed_annotation: ^3.1.0
+  json_annotation: ^4.9.0
 
 dev_dependencies:
   flutter_test:
@@ -39,6 +42,8 @@ dev_dependencies:
   riverpod_generator: ^4.0.0+1
   build_runner: ^2.12.2
   auto_route_generator: ^10.4.0
+  freezed: ^3.2.3
+  json_serializable: ^6.11.2
 
 flutter:
   uses-material-design: true