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>

.storybook/main.ts

@@ -0,0 +1,32 @@
+import type { StorybookConfig } from '@storybook/react-vite';
+
+const config: StorybookConfig = {
+  stories: ['../src/**/*.stories.@(ts|tsx)'],
+  addons: [
+    '@storybook/addon-essentials',
+    '@storybook/addon-a11y',
+    '@storybook/addon-designs',
+    {
+      name: '@storybook/addon-storysource',
+      options: {
+        loaderOptions: {
+          injectStoryParameters: true,
+        },
+      },
+    },
+  ],
+  framework: {
+    name: '@storybook/react-vite',
+    options: {},
+  },
+  docs: {
+    autodocs: 'tag',
+  },
+  staticDirs: ['../brandassets'],
+  viteFinal: async (config) => {
+    // Inherit aliases from vite.config.ts automatically via react-vite framework
+    return config;
+  },
+};
+
+export default config;