feat(catalog): sovereign catalog — provenance + de-superpowers (idea 12)

- author: ours / adapted-from frontmatter on all 38 skills (scripts/add-provenance.py, idempotent)
- versions added to vendor copies (caveman x5, find-skills) + active-platform
- README(en/ru): new Sovereignty/Adapted-from section, drop wiki-maintainer & superpowers refs
- project-bootstrap v1.12.0 -> v1.13.0: remove 'use superpowers' trigger from template
  + trigger table; recommend-dont-menu wording no longer references superpowers:brainstorming
- dist rebuilt to 38 (pruned stale update-claude-skills.skill)
- lint: 0 violations, 0 warnings

skills/find-skills/SKILL.md

@@ -1,5 +1,7 @@
 ---
 name: find-skills
+adapted-from: vercel-labs/skills (MIT) — vendored copy, upstream pin TBD
+version: 0.1.0
 description: Helps users discover and install agent skills when they ask questions like "how do I do X", "find a skill for X", "is there a skill that can...", or express interest in extending capabilities. This skill should be used when the user is looking for functionality that might exist as an installable skill.
 ---