Revert "chore: Remove dss-claude-plugin directory"

This reverts commit 72cb7319f5.

dss-claude-plugin/.mcp.json

@@ -0,0 +1,22 @@
+{
+  "x-immutable-notice": {
+    "protected": true,
+    "reason": "MCP server configuration - maintains Claude Code integration stability",
+    "lastModified": "2025-12-09",
+    "bypassMethod": "Use 'DSS_IMMUTABLE_BYPASS=1 git commit' or commit message '[IMMUTABLE-UPDATE] reason'"
+  },
+  "mcpServers": {
+    "dss": {
+      "command": "python3",
+      "args": ["${CLAUDE_PLUGIN_ROOT}/servers/dss-mcp-server.py"],
+      "env": {
+        "PYTHONPATH": "${CLAUDE_PLUGIN_ROOT}/..:${CLAUDE_PLUGIN_ROOT}",
+        "DSS_HOME": "${CLAUDE_PLUGIN_ROOT}/../.dss",
+        "DSS_DATABASE": "${CLAUDE_PLUGIN_ROOT}/../.dss/dss.db",
+        "DSS_CACHE": "${CLAUDE_PLUGIN_ROOT}/../.dss/cache",
+        "DSS_BASE_PATH": "${CLAUDE_PLUGIN_ROOT}/.."
+      },
+      "description": "Design System Server MCP server providing design token and component analysis tools"
+    }
+  }
+}