feat: Implement Centralized AI Workspace, History Filtering, and Enhanced UI Rendering

[Yashh56]

🚀 What's Changed

This PR significantly enhances the AI experience within RelWave by centralizing AI features, strictly scoping AI history to the active database context, and improving how AI results are rendered in the UI.

✨ Features

• AI Workspace Panel: Created a centralized AIWorkspacePanel within the Database Details page. It acts as a dedicated hub for all AI features (Schema Analysis, NL to SQL, Query Explanation) and their history.
• Context-Aware AI History: AI history is now strictly filtered by datasource_id.
• Enhanced UI Rendering:
  • Added a custom FormattedResponseRenderer to intelligently parse and beautifully render JSON responses for Natural Language to SQL and Chart Recommendation features.
  • Added Markdown table parsing support to MarkdownRenderer for clean, native-looking tables in Query Explanations.
• AI Disclaimers: Added "AI can make mistakes" disclaimers across all AI generation touchpoints to properly set user expectations.

🐛 Bug Fixes

• Query Explanation Context: Fixed a bug where databaseName was being passed instead of dbId, causing Query Explanation history to vanish from the context-aware history panel.
• Chart Recommendation Context: Fixed an issue where Chart Recommendations were missing the datasource_id entirely.

📦 Commits Included

• feat: Add centralized AI Workspace panel with action cards
• feat: Filter AI History by database context
• fix: Pass correct dbId for Query Explanation and Chart Recommendation
• feat: Add AI disclaimers and structured JSON rendering in AI dialogs