chore: Remove dss-claude-plugin directory

Removing obsolete plugin directory after consolidation.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

dss-claude-plugin/.claude-plugin/plugin.json

@@ -1,20 +0,0 @@
-{
-  "name": "dss-claude-plugin",
-  "version": "1.0.0",
-  "description": "Design System Server (DSS) integration for Claude Code - Analyze, extract, and generate design system tokens and components",
-  "author": {
-    "name": "overbits",
-    "url": "https://github.com/overbits"
-  },
-  "homepage": "https://dss.overbits.luz.uy",
-  "keywords": [
-    "design-system",
-    "tokens",
-    "css",
-    "scss",
-    "tailwind",
-    "figma",
-    "storybook"
-  ],
-  "commands": "./commands/"
-}