chore: install superpowers skill framework

- Add all 12 skills to .claude/skills/
- Add hooks for session-start bootstrap
- Add CLAUDE.md with using-superpowers bootstrap
- Configure settings.json with SessionStart hooks

.claude/settings.json

@@ -0,0 +1,17 @@
+{
+  "hooks": {
+    "SessionStart": [
+      {
+        "matcher": "startup|clear|compact",
+        "hooks": [
+          {
+            "type": "command",
+            "command": "\"${CLAUDE_PLUGIN_ROOT:-.claude/plugins/superpowers}/hooks/run-hook.cmd\" session-start",
+            "shell": "bash",
+            "async": false
+          }
+        ]
+      }
+    ]
+  }
+}