feat: Implement audio transcription and agent hooks

- Added a new POST route for audio transcription in `app/api/audio/route.ts` that utilizes the Mastra instance to transcribe audio files uploaded via form data.
- Created custom hooks for managing agent interactions:
  - `lib/hooks/use-agent-messages.ts`: Fetches messages from a specific thread for a given agent.
  - `lib/hooks/use-agent.ts`: Retrieves details of a specified agent.
  - `lib/hooks/use-delete-thread.ts`: Provides functionality to delete a memory thread and invalidate related queries.
  - `lib/hooks/use-memory.ts`: Checks the memory status of a specified agent.
  - `lib/hooks/use-mobile.ts`: Detects if the application is being accessed on a mobile device.
  - `lib/hooks/use-threads.ts`: Lists memory threads for a specific resource and agent.
- Introduced a new note-taking agent in `src/mastra/agents/noteTakerAgent.ts` with specific instructions and voice capabilities using Google Voice.
- Established a structured approach for handling memory and threads in the application, enhancing the overall functionality and user experience.