Add Xquik support to Twitter client

[kriptoburak]

Summary

• Adds an explicit Xquik provider for the Rust Twitter client.
• Maps search, user profile, user timeline, and tweet lookup calls to Xquik endpoint names, query parameters, headers, and response shapes.
• Keeps TwitterAPI.io as the first from_env provider while allowing XQUIK_API_KEY as an alternative configuration.
• Adds provider URL and Xquik response deserialization tests.

Validation

• cargo fmt --check
• cargo test twitter_xquik - 6 passed; existing warnings remain in src/solana/deploy_token.rs.
• Duplicate gate checked: no matching Xquik PRs or issues in piotrostr/listen.
• Broken-link/API reachability check: GitHub repo URL returned 200; https://xquik.com/api/v1/x/tweets/search returned 402 as an expected gated API endpoint; https://api.twitterapi.io returned 401 as an expected gated API endpoint.