feat(update-claude-skills): add update skill + scripts [v0.1.0]

New skill and cross-platform scripts that automate the full uplift cycle:
git pull → conditionally rebuild MCP servers → install skills → version
diff → reload hints. Claude-Code-only (Hermes uses hermes-installer-skill).

- scripts/update.sh: bash version (Linux/macOS/git-bash)
- scripts/update.ps1: PowerShell version (Windows)
- skills/update-claude-skills/SKILL.md: thin wrapper, detects platform
- hermes/mapping.yaml: mode: skip (Claude-Code-only)
- dist/update-claude-skills.skill: built archive
- .tasks/STATUS.md: task marked done

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

hermes/mapping.yaml

@@ -133,3 +133,7 @@ skills:
   recommend-dont-menu:
     mode: auto
     category: productivity
+
+  update-claude-skills:
+    mode: skip
+    reason: "Claude-Code-only orchestrator — Hermes uses hermes-installer-skill instead."