docs: add TweetClaw X source packet handoff

[kriptoburak]

Summary

• Add an optional TweetClaw/OpenClaw source-packet handoff for X/Twitter media digests.
• Keep x-reader responsible for URL reading, transcription, and digest output.
• Keep account actions, publishing, replies, direct messages, and credential handling inside the approved TweetClaw/OpenClaw workflow.

Validation

• git diff --check
• python3 -m compileall -q x_reader tests
• python3 -m unittest discover -s tests
• direct link checks for runesleo/x-reader, TweetClaw GitHub, and npm registry metadata
• npm view @xquik/tweetclaw@1.6.31 version openclaw.install --json
• added-line public-hygiene scan; matches were limited to credential-boundary wording

Duplicate check

• Searched TweetClaw audit memory and archive.
• Checked repo content for TweetClaw, Xquik, x-twitter-scraper, OpenClaw, and ClawHub terms.
• Read the recent target PR and issue lists before opening.

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