feat: add Xquik social research and repair skill sources

[kriptoburak]

Description

This PR makes 3 target-native improvements:

1. Add xquik-social-research to the content creator workflow, including its source manifest, vendored Skill, English and Chinese tables, agent trigger map, and API-key prerequisite.
2. Repair the moved upstream paths for competitive-ads-extractor and skill-navigator, so source validation and future refreshes resolve their current skills_all/ locations.
3. Refresh the vendored Xquik Skill from its current source, include its MIT license, and add the required affiliation notice to both workflow guides.

The Xquik Skill supports bounded public X research for posts, profiles, threads, followers, and trends. It defaults to public reads and requires approval before private reads, writes, monitors, webhooks, or bulk jobs.

Type of Change

• New workflow
• New skill
• Bug fix
• Documentation update

Independent Repository Fix

The existing source manifest used 2 obsolete paths in Microck/ordinary-claude-skills. Both now point to the live skills_all/ directories. GitHub API validation confirms each repaired directory exists.

Validation

• Confirmed the branch is current with upstream main
• Confirmed all 3 touched source directories exist through the GitHub API
• Ran update_skills.py with Python 3.13 and downloaded the configured Xquik Skill successfully
• Confirmed the vendored SKILL.md and LICENSE match source commit 1641e3f
• Validated all 199 vendored SKILL.md files have required frontmatter
• Validated 32 unique manifest entries, bilingual documentation, agent routing, prerequisites, and affiliation text
• Checked every added public link: HTTP 200
• Ran git diff --check

The full source audit retains unrelated historical unavailable or moved entries. This PR repairs only the 2 independently verified source paths.

Xquik is an independent third-party service. Not affiliated with X Corp. "Twitter" and "X" are trademarks of X Corp.

[kriptoburak]

The repaired head 6948ef5 is ready for review.

• The 2 independent manifest repairs resolve current skills_all/ directories.
• The vendored Xquik Skill and license match source commit 1641e3f.
• All 3 touched GitHub source directories exist.
• All 199 vendored Skill files pass required frontmatter checks.
• The 32-entry manifest, bilingual documentation, agent routing, public links, and diff checks pass.

@nicepkg, could you review when convenient?