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/switch.json

@@ -0,0 +1,17 @@
+{
+  "switch": {
+    "$description": "Switch component tokens — toggle control for enabling/disabling options. Used in arrangement forms for add-on services.",
+    "track": {
+      "$type": "dimension",
+      "$description": "Switch track dimensions.",
+      "width": { "$value": "44px", "$description": "Track width — slightly narrower than Figma 52px for better proportion with 44px touch target" },
+      "height": { "$value": "24px", "$description": "Track height" },
+      "borderRadius": { "$value": "{borderRadius.full}", "$description": "Pill shape" }
+    },
+    "thumb": {
+      "$type": "dimension",
+      "$description": "Switch thumb (knob) dimensions.",
+      "size": { "$value": "18px", "$description": "Thumb diameter — sits inside the track with 3px inset" }
+    }
+  }
+}