Add optional Hermes Tweet read provider

[kriptoburak]

Summary

• add provider: "hermes-tweet" as an opt-in reader backend while preserving the existing default reader behavior
• map existing read tools to Xquik endpoints used by Hermes Tweet, including tweet search, tweet lookup, replies, quotes, threads, users, followers, following, mentions, and trends
• document the alternate reader config and add Bun tests for route mapping, custom base URLs, header forwarding, and unsupported provider validation

Validation

• bun test src/clients/reader.test.ts
• bun build src/index.ts --target=bun --outfile /tmp/hermes-tweet-outreach/twitter-mcp-index.js
• git diff --cached --check

bunx tsc --noEmit still fails on the repository's existing missing tough-cookie declaration in src/clients/cookie.ts, unrelated to this change.

Duplicate check

Before opening, I checked open and closed PRs, issues, and code search for existing Hermes Tweet or Xquik mentions in this repository and found none.