Updated MCP status in main readme

[way0utwest]

Why make this change?

• Reference associated issue using # syntax. e.g. Closes #XX
  • Include summary (1-2 sentences) of linked issue to avoid redirecting reviewers to different pages.
  • Include links to any additional discussion threads related to this change.

What is this change?

• Summary of how your changes work to give reviewers context of your intent.
  • Links to relevant documentation / StackOverflow, if applicable.

How was this tested?

• Integration Tests
• Unit Tests

Sample Request(s)

• Example REST and/or GraphQL request to demonstrate modifications
• Example of CLI usage to demonstrate modifications

[Copilot]

Pull request overview

Updates the project README to reflect current MCP endpoint support status, keeping the top-level capability matrix accurate for readers discovering Data API builder (DAB).

Changes:

• Marked MCP endpoints as Supported in the README endpoints support table.
• Cleaned up minor Markdown formatting/indentation in the Trademarks section.