feat: Superpowers for Copilot Chat VS Code extension v1.0.0

- @superpowers chat participant with 14 skill slash commands
- Bundled SKILL.md files for all Superpowers skills
- Custom skill support via ~/.copilot/skills/superpowers/
- Live file watcher — custom skills reload without restart
- TypeScript source: skillLoader, participant, watcher, extension

Skills: brainstorming, tdd, debug, plan, execute, subagent,
parallel, review, receive-review, verify, worktree, finish,
write-skill, superpowers

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

README.md

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+# Superpowers for Copilot Chat
+
+Bring [Superpowers skills](https://github.com/DwainTR/superpowers-copilot) to GitHub Copilot Chat in VS Code. A structured set of AI workflows for brainstorming, TDD, debugging, planning, code review, and more.
+
+## Requirements
+
+- VS Code >= 1.90.0
+- [GitHub Copilot](https://marketplace.visualstudio.com/items?itemName=GitHub.copilot) extension
+
+## Usage
+
+Invoke skills using the `@superpowers` chat participant with a slash command:
+
+```
+@superpowers /brainstorming  — Design a feature before writing code
+@superpowers /tdd            — Implement with Test-Driven Development
+@superpowers /debug          — Systematically debug unexpected behavior
+@superpowers /plan           — Write a detailed implementation plan
+@superpowers /verify         — Confirm work is done before claiming complete
+```
+
+Type `@superpowers` (no command) to see all available skills.
+
+## Custom Skills
+
+Add your own skills by placing `SKILL.md` files in `~/.copilot/skills/superpowers/` (or configure a custom path in settings). Custom skills are automatically detected without restarting VS Code.
+
+Invoke custom skills with: `@superpowers custom <skill-name>`
+
+## All Skills
+
+| Slash Command | What It Does |
+|---|---|
+| `/brainstorming` | Collaborative design before implementation |
+| `/tdd` | Test-Driven Development workflow |
+| `/debug` | Systematic root-cause debugging |
+| `/plan` | Implementation planning from a spec |
+| `/execute` | Execute a written plan step by step |
+| `/subagent` | Break work into parallel subagent tasks |
+| `/parallel` | Dispatch independent tasks concurrently |
+| `/review` | Pre-review code quality checklist |
+| `/receive-review` | Process code review feedback rigorously |
+| `/verify` | Verification before claiming complete |
+| `/worktree` | Git worktree isolation for feature branches |
+| `/finish` | Finish a branch — merge, PR, or cleanup |
+| `/write-skill` | Create a new Superpowers skill |
+| `/superpowers` | Learn how to use Superpowers effectively |
+
+## Settings
+
+| Setting | Default | Description |
+|---|---|---|
+| `superpowers.customSkillsPath` | `""` (uses `~/.copilot/skills/superpowers/`) | Custom skills directory |
+| `superpowers.enableCustomSkills` | `true` | Enable/disable custom skill loading |
+
+## Based On
+
+Skills authored by [Jesse Vincent](https://github.com/jessevondoom). This extension packages them for native VS Code Copilot Chat use.
+
+Source: [DwainTR/superpowers-copilot](https://github.com/DwainTR/superpowers-copilot)