Initial commit: FA Design System source files

Copy of the Funeral Arranger design system components, theme, tokens,
and Storybook config from the original Parsons project. Pre-upgrade
baseline with React 18, MUI v5, Storybook 8.

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

tokens/component/radio.json

@@ -0,0 +1,15 @@
+{
+  "radio": {
+    "$description": "Radio component tokens — single-select control for mutually exclusive options. Used in service selection, payment method, and arrangement forms.",
+    "size": {
+      "$type": "dimension",
+      "$description": "Radio button outer circle size.",
+      "default": { "$value": "20px", "$description": "Default radio size — matches Figma 16px + padding for 44px touch target area" }
+    },
+    "dotSize": {
+      "$type": "dimension",
+      "$description": "Inner dot size when selected.",
+      "default": { "$value": "10px", "$description": "Selected indicator dot — 50% of outer size" }
+    }
+  }
+}