docs: align skill pages with runnable examples inventory

[narutamaaurum]

Summary

• add explicit Runnable examples notes to affected skill pages
• point each page at the checked-in scripts that really exist under examples/
• mark catalog-only/provider-snippet sections clearly where no dedicated runnable example exists yet

Validation

• python3 -m flake8 docs/skills
• git diff --check
• verified every referenced example path exists under examples/
• targeted pytest spot checks: skills/dev_tools/issue_resolver/test_skill.py, tests/test_skill_issuer.py

Closes #119

[rosspeili]

Thanks @narutamaaurum, this closes #119 nicely. 🎉

Runnable examples blocks look good across the catalog pages, script names match examples/README.md, and the wallet screening Ollama note is spot on. Docs-only, clean scope. Fine to keep the #118 pointer on issue_resolver.

If you feel like another quick win, #117 is still open, and updates agent_loops.md sync.