Document a high-capability OpenClaw scan fixture

[kriptoburak]

Summary

• Add TweetClaw as a concrete high-capability OpenClaw plugin scan fixture across GitHub, npm, ClawHub, and the OpenClaw install command.
• Expand the suspicious-skill report template with npm package, ClawHub listing, and install-command fields.
• Replace two stale GitHub source links with the current public awesome-openclaw-skills list and neutral public repository wording.

Validation

• git diff --check
• Added-line dash scan
• Added-line sensitive-string scan
• README, CONTRIBUTING, and issue-template link sweep: 29 external links checked, 0 failures
• npm view @xquik/tweetclaw version --silent returned 1.6.31

Note: Product Hunt and npm package web pages returned 403 bot-protection responses during link checking. The npm registry metadata check passed.