feat/deprecate-elfa-ai

[AdwitM]

Pull Request Description

Changes Made

This PR removes the Elfa AI integration from the Solana Agent Kit:

• Deleted files:

  • docs/v1/features/non-financial/elfa_ai.mdx - v1 documentation
  • docs/v2/integrations/non-financial/elfa_ai.mdx - v2 documentation
  • packages/plugin-misc/src/elfaai/actions/index.ts - main Elfa AI actions
  • packages/plugin-misc/src/elfaai/tools/elfa_ai_api.ts - API integration tools

• Updated files:

  • .env.example - removed Elfa AI environment variable
  • packages/core/src/types/index.ts - removed Elfa AI config type
  • packages/plugin-misc/src/index.ts - removed Elfa AI exports and tools
  • Documentation files - removed Elfa AI references and examples

Checklist

• I have tested these changes locally
• I have updated the documentation