refactor: consolidate plugin.json metadata into marketplace.json

Merge license, homepage, repository, keywords, and author from
plugin.json into marketplace.json and remove the redundant file.
The npx skills installer only reads marketplace.json for skill
discovery — plugin.json contributed no functional value.

Author: bmadcode

.claude-plugin/marketplace.json

@@ -3,12 +3,19 @@
   "owner": {
     "name": "Brian (BMad) Madison"
   },
+  "license": "MIT",
+  "homepage": "https://github.com/bmad-code-org/bmad-module-creative-intelligence-suite",
+  "repository": "https://github.com/bmad-code-org/bmad-module-creative-intelligence-suite",
+  "keywords": ["bmad", "creative", "brainstorming", "design-thinking", "innovation", "storytelling"],
   "plugins": [
     {
       "name": "bmad-creative-intelligence-suite",
       "source": "./",
-      "description": "Creative AI agents and workflows — brainstorming, problem-solving, design thinking, innovation strategy, storytelling, and visual presentations.",
+      "description": "A suite of creative AI agents and workflows for brainstorming, problem-solving, design thinking, innovation strategy, storytelling, and presentations. Part of the BMad Method ecosystem.",
       "version": "0.1.9",
+      "author": {
+        "name": "Brian (BMad) Madison"
+      },
       "skills": [
         "./src/skills/bmad-cis-agent-brainstorming-coach",
         "./src/skills/bmad-cis-agent-creative-problem-solver",