docs: add Kilo Code MCP setup instructions

[roian6]

Closes #24

Summary

• Add Kilo Code MCP setup instructions to the README's coding-agent integration section.
• Document the current kilo.jsonc mcp config shape for running ccc mcp as a local MCP server.
• Align the README with the linked Reddit background that cocoindex-code started working in Kilo Code pre-release 7.0.33.

Validation

• Verified the Reddit background via the public Reddit RSS route: the linked comment says this started working in Kilo Code pre-release 7.0.33.
• Verified the issue is still open and unassigned.
• Checked the issue timeline and duplicate PR/issue searches for Kilo/README/Reddit-link wording; no duplicate PR found.
• Verified the README previously had Claude Code, Codex, and OpenCode MCP setup examples but no Kilo Code instructions.
• Checked current Kilo docs for kilo.jsonc MCP configuration: global/project config paths, mcp key, local type, command, and enabled fields.
• Checked the updated README section for balanced <details> blocks, final newline, no trailing whitespace, no added credential-like strings, and git diff --check.
• Ran README-scoped pre-commit doc hooks for trailing whitespace, end-of-file, added-large-files, and merge-conflict checks; all passed.

Note: running the full pre-commit hook on README.md also invokes the repository-wide pytest hook (pass_filenames: false). That fails in my local environment because of existing sqlite_vec/HuggingFace cache setup issues, not because of this README-only documentation patch.

[badmonster0]

this is a amazing, thanks a lot @roian6 !