sync: vendor mattpocock/skills @49dd158 (v1.3.1) with sync tooling

upstream/skills/misc/README.md

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+# Misc
+
+Tools I keep around but rarely use, not promoted in the plugin.
+
+- **[git-guardrails-claude-code](./git-guardrails-claude-code/SKILL.md)**: Set up Claude Code hooks to block dangerous git commands (push, reset --hard, clean, etc.) before they execute.
+- **[migrate-to-shoehorn](./migrate-to-shoehorn/SKILL.md)**: Migrate test files from `as` type assertions to @total-typescript/shoehorn.
+- **[scaffold-exercises](./scaffold-exercises/SKILL.md)**: Create exercise directory structures with sections, problems, solutions, and explainers.
+- **[setup-pre-commit](./setup-pre-commit/SKILL.md)**: Set up Husky pre-commit hooks with lint-staged, Prettier, type checking, and tests.