feat(i18n): Refactor prompts and search agent to enhance language handling and formatting instructions

- Updated academicSearch, redditSearch, webSearch, wolframAlpha, writingAssistant, and youtubeSearch prompts to improve clarity and consistency in formatting instructions.
- Added language handling instructions to writingAssistant and other prompts for better localization support.
- Modified MetaSearchAgent to include locale and language parameters for improved prompt generation and language-specific responses.

# Conflicts:
#	Dockerfile

src/app/api/chat/route.ts

@@ -50,6 +50,7 @@ type Body = {
   chatModel: ChatModel;
   embeddingModel: EmbeddingModel;
   systemInstructions: string;
+  locale: string;
 };
 
 const handleEmitterEvents = async (
@@ -280,6 +281,7 @@ export const POST = async (req: Request) => {
       body.optimizationMode,
       body.files,
       body.systemInstructions,
+      body.locale,
     );
 
     const responseStream = new TransformStream();