chore(claude): enable obra/superpowers plugin (#14789)

Automatically add superpowers marketplace and enable the
[obra/superpowers plugin](https://github.com/obra/superpowers).

Author: denolfe

.claude/settings.json

@@ -1,4 +1,15 @@
 {
+  "extraKnownMarketplaces": {
+    "superpowers-dev": {
+      "source": {
+        "source": "github",
+        "repo": "obra/superpowers"
+      }
+    }
+  },
+  "enabledPlugins": {
+    "superpowers@superpowers-dev": true
+  },
   "hooks": {
     "PostToolUse": [
       {
@@ -38,6 +49,15 @@
       "Bash(pnpm why:*)",
       "Bash(pwd)",
       "Bash(which:*)",
+      "Skill(superpowers:brainstorming)",
+      "Skill(superpowers:executing-plans)",
+      "Skill(superpowers:requesting-code-review)",
+      "Skill(superpowers:subagent-driven-development)",
+      "Skill(superpowers:systematic-debugging)",
+      "Skill(superpowers:testing-anti-patterns)",
+      "Skill(superpowers:using-git-worktrees)",
+      "Skill(superpowers:writing-plans)",
+      "Skill(superpowers:writing-skills)",
       "WebFetch(domain:docs.aws.amazon.com)",
       "WebFetch(domain:docs.claude.com)",
       "WebFetch(domain:github.com)",