feat: add message translation support

- Introduced translation functionality in chat screen, allowing users to translate messages before sending.
- Added MessageTranslationButton to the input bar for enabling/disabling translation.
- Implemented translation service to handle incoming and outgoing text translations using llama models.
- Enhanced message storage to include original and translated text, language codes, and translation status.
- Created UI components for displaying translated messages and managing translation options.
- Added translation model management, including downloading and storing models locally.
- Updated app settings to manage translation preferences and model selections.

pubspec.yaml

@@ -71,6 +71,17 @@ dependencies:
   flutter_blue_plus_platform_interface: ^8.2.1
   ml_algo: ^16.0.0
   ml_dataframe: ^1.0.0
+  llamadart: '>=0.6.8 <0.7.0'
+
+hooks:
+  user_defines:
+    llamadart:
+      llamadart_native_backends:
+        platforms:
+          android-arm64:
+            backends: [cpu]
+          android-x64:
+            backends: [cpu]
 
 dev_dependencies:
   flutter_test: