fix: add marketplace.json and remove duplicate hooks declaration

marketplace.json is required for Claude Code plugin indexing.
hooks/hooks.json is auto-discovered — declaring it in plugin.json
causes a duplicate-load error.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

.claude-plugin/marketplace.json

@@ -0,0 +1,26 @@
+{
+  "name": "git.sethpc.xyz-connector",
+  "owner": {
+    "name": "Seth",
+    "url": "https://git.sethpc.xyz"
+  },
+  "metadata": {
+    "description": "Connect Claude Code to Seth's Gitea instance (git.sethpc.xyz) — guided setup, CLI, commit conventions, and a gentle nudge to push.",
+    "version": "1.0.0"
+  },
+  "plugins": [
+    {
+      "name": "git.sethpc.xyz-connector",
+      "description": "Connect Claude Code to Seth's Gitea instance (git.sethpc.xyz) — guided setup, CLI, commit conventions, and a gentle nudge to push.",
+      "source": "./",
+      "strict": true,
+      "category": "git",
+      "keywords": [
+        "git",
+        "gitea",
+        "sethpc",
+        "homelab"
+      ]
+    }
+  ]
+}

.claude-plugin/plugin.json

@@ -9,6 +9,5 @@
   "homepage": "https://git.sethpc.xyz/Seth/git.sethpc.xyz-connector",
   "repository": "https://git.sethpc.xyz/Seth/git.sethpc.xyz-connector",
   "license": "MIT",
-  "commands": ["./commands"],
-  "hooks": "./hooks/hooks.json"
+  "commands": ["./commands"]
 }