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>

tsconfig.json

@@ -0,0 +1,15 @@
+{
+  "compilerOptions": {
+    "module": "commonjs",
+    "target": "ES2022",
+    "outDir": "out",
+    "rootDir": "src",
+    "lib": ["ES2022"],
+    "sourceMap": true,
+    "strict": true,
+    "esModuleInterop": true,
+    "skipLibCheck": true
+  },
+  "include": ["src/**/*"],
+  "exclude": ["node_modules", "out"]
+}