Convert /commit command to skill

Adds disable-model-invocation and allowed-tools restrictions
that structurally enforce commit safety.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

.claude/skills/commit/SKILL.md

@@ -1,5 +1,8 @@
 ---
+name: commit
 description: Create a git commit with pre-commit hooks (bypasses sandbox restrictions).
+disable-model-invocation: true
+allowed-tools: Bash(git *), Bash(pnpm *)
 ---
 
 ## Instructions