fix(plugins): remove redundant plugin.json and fix command formats

- Remove .claude-plugin/plugin.json from conductor and startup-business-analyst
  (marketplace.json provides all config, standalone plugin.json breaks installation)
- Remove YAML frontmatter from startup-business-analyst commands
- Bump versions: conductor 1.0.3, startup-business-analyst 1.0.1

plugins/conductor/.claude-plugin/plugin.json

@@ -1,20 +0,0 @@
-{
-  "name": "conductor",
-  "version": "1.0.2",
-  "description": "Context-Driven Development plugin that transforms Claude Code into a project management tool. Implements structured workflow: Context → Spec & Plan → Implement with full TDD support, track-based work units, and semantic git reversion.",
-  "author": {
-    "name": "Seth Hobson",
-    "url": "https://github.com/wshobson"
-  },
-  "homepage": "https://github.com/wshobson/agents",
-  "repository": "https://github.com/wshobson/agents",
-  "license": "MIT",
-  "keywords": [
-    "project-management",
-    "context-driven-development",
-    "tdd",
-    "planning",
-    "specifications",
-    "workflow"
-  ]
-}