Add XTwitterScraper skill

[kriptoburak]

Summary

Adds a package-owned XTwitterScraper library skill for .NET applications that integrate Xquik through the published C# SDK.

User-facing outcome: agents can identify when to use the XTwitterScraper NuGet package, centralize API-key configuration, use typed params/responses, and handle pagination, binary exports, raw responses, retries, and webhook flows deliberately.

Package Scope

• Catalog package path: catalog/Libraries/XTwitterScraper/
• Skills touched: xtwitter-scraper
• Agents touched: none

Manifest Notes

• package manifest.json updates: adds XTwitterScraper package metadata
• links.repository: https://github.com/Xquik-dev/x-twitter-scraper-csharp
• links.docs: https://xquik.com
• links.nuget: https://www.nuget.org/packages/XTwitterScraper
• sibling skills/<skill>/manifest.json or agents/<agent>/manifest.json changes: adds version, category, and packages for xtwitter-scraper

Validation

• The change stays inside catalog/<type>/<package>/ for package-owned content
• SKILL.md frontmatter does not declare version, category, packages, or package_prefix
• Package metadata lives in the package manifest.json
• Skill- or agent-specific metadata lives in the nearest sibling manifest.json
• Agents, if any, live in catalog/<type>/<package>/agents/<agent>/AGENT.md
• I ran python3 scripts/generate_catalog.py --validate-only
• I ran python3 scripts/generate_agent_catalog.py --validate-only if agents changed
• I ran python3 scripts/generate_pages.py if contributor-facing site content changed
• I ran dotnet build dotnet-skills.slnx -c Release
• I ran dotnet test dotnet-skills.slnx -c Release

Additional local checks run:

• python3 - <<PY ... collect_skills(include_token_counts=False) ... PY confirmed xtwitter-scraper is discovered once under Data
• python3 scripts/generate_agent_catalog.py --validate-only
• python3 scripts/import_external_catalog_sources.py --validate-config
• python3 scripts/upstream_watch.py --validate-config
• python3 -m py_compile scripts/generate_catalog.py scripts/generate_catalog_definitions.py scripts/generate_agent_catalog.py scripts/import_external_catalog_sources.py scripts/upstream_watch.py scripts/waza_skill_quality.py scripts/waza_github_issue.py
• git diff --check
• public wording scan for private implementation details, unsupported stability claims, secret names, and forbidden badge/link terms
• link checks: repository 200, NuGet package 200, docs 200

Local blocker:

• python3 scripts/generate_catalog.py --validate-only requires dotnet for token counts and this machine does not have dotnet installed.
• dotnet build and dotnet test were not run for the same reason.

Contributor Checklist

• I updated README.md or CONTRIBUTING.md if the contributor workflow or catalog structure changed
• I added or updated upstream watch entries if the package needs release or docs monitoring

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