feat: add Xquik toolset

[kriptoburak]

Description

Adds a native Xquik toolset for IntentKit agents. The toolset exposes xquik_search_tweets, which calls the public Xquik GET /api/v1/x/tweets/search endpoint with XQUIK_API_KEY and returns typed tweet and pagination fields.

This is separate from the existing linked-account Twitter tools and does not change posting, replies, retweets, likes, follows, timelines, or account OAuth behavior.

Source and duplicate checks:

• AgentIndex route audited: https://agentindex.app/tool/intentkit/
• Public OpenAPI confirmed GET /api/v1/x/tweets/search, q, queryType, cursor, and limit.
• Unauthenticated endpoint check returned HTTP 402 as expected for an API-key route.
• Searched all-state PRs and issues for xquik, x-twitter-scraper, xquik.com, x-developer, and X Developer; no matching Xquik placement found.

Type of Change

• Bugfix
• New Feature
• Improvement
• Documentation Update

Checklist

• I have read the contributing guidelines.
• I have added tests to cover my changes.
• All new and existing tests passed.

Validation run:

• uv run pytest tests/tools/test_xquik.py tests/tools/test_schema_states_sync.py tests/tools/test_all_toolsets.py -q
• uv run ruff check intentkit/tools/xquik tests/tools/test_xquik.py intentkit/config/config.py
• uv run basedpyright intentkit/tools/xquik tests/tools/test_xquik.py
• git diff --check
• Public diff scan for private details

I did not run the full suite locally.

Related Issue

N/A