Fix plugin manifest schema for Claude Code marketplace

Claud code `/plugin marketplace add steveyegge/beads` fix

.claude-plugin/marketplace.json

@@ -7,7 +7,7 @@
   "plugins": [
     {
       "name": "beads",
-      "source": ".",
+      "source": "./",
       "description": "AI-supervised issue tracker for coding workflows",
       "version": "0.9.2"
     }

.claude-plugin/plugin.json

@@ -6,10 +6,7 @@
     "name": "Steve Yegge",
     "url": "https://github.com/steveyegge"
   },
-  "repository": {
-    "type": "git",
-    "url": "https://github.com/steveyegge/beads"
-  },
+  "repository": "https://github.com/steveyegge/beads",
   "license": "MIT",
   "homepage": "https://github.com/steveyegge/beads",
   "keywords": [