### What problem does this PR solve?
Add mcp self-host mode documentation, a complement of #7141.
### Type of change
- [x] Documentation Update
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Co-authored-by: writinwaters <93570324+writinwaters@users.noreply.github.com>
### What problem does this PR solve?
Documentation for MCP server
### Type of change
- [x] Documentation Update
---------
Co-authored-by: writinwaters <93570324+writinwaters@users.noreply.github.com>