chore: add MCP server config for Figma integration

Adds shared .mcp.json so all developers using Claude Code can
connect to the Figma Dev Mode MCP server out of the box.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: bfoss765

.mcp.json

@@ -0,0 +1,9 @@
+{
+  "mcpServers": {
+    "figma-dev-mode-mcp-server": {
+      "command": "npx",
+      "args": ["-y", "@figma/mcp-server-figma-dev-mode"],
+      "description": "Figma Dev Mode MCP server for extracting design specifications, code, and images from Figma files"
+    }
+  }
+}