fix: handle CLI metadata flags

[Dolpme]

Summary

• handle --help/-h and --version/-v before starting the MCP stdio server
• reject unknown flags before server startup instead of hanging
• keep existing server configuration flags flowing through to the current parser

Verification

• npm test -- test/cli.test.ts
• npm run build
• npx prettier --check src/cli.ts src/index.ts test/cli.test.ts
• npx eslint src/cli.ts src/index.ts test/cli.test.ts (0 errors; existing no-explicit-any warning in src/index.ts)
• node dist/esm/index.js --help
• node dist/esm/index.js --version
• node dist/esm/index.js --bogus (exits 1)

Note: full npm run lint is blocked locally on Windows by repository-wide CRLF/Prettier line-ending errors in existing files outside this change.

[mattpodwysocki]

Hey, the fix looks good! One thing we require before merging is a CHANGELOG entry under the Unreleased section at the top of CHANGELOG.md. Just a short line describing what changed and why is fine. Take a look at recent entries for the format.

[Dolpme]

Added the CHANGELOG.md entry under Unreleased -> Fixes in 0465519.

[mattpodwysocki]

Thanks for adding the CHANGELOG entry. Looks good to me!