feat(ui): add wedding theme styles and layout components

* Introduced wedding-themed CSS variables for styling.
* Created layout component for the wedding site with navigation and countdown.
* Added RSVP and photo upload pages with form handling.
* Implemented QR code page for wedding site access.
* Configured TypeScript and Vite for the project.
* Added robots.txt for search engine crawling.

ui/vite.config.ts

@@ -0,0 +1,20 @@
+import tailwindcss from '@tailwindcss/vite';
+import adapter from '@sveltejs/adapter-static';
+import { sveltekit } from '@sveltejs/kit/vite';
+import { defineConfig } from 'vite';
+
+export default defineConfig({
+	server: {
+		fs: { allow: ['assets'] }
+	},
+	plugins: [
+		tailwindcss(),
+		sveltekit({
+			compilerOptions: {
+				// Force runes mode for the project, except for libraries. Can be removed in svelte 6.
+				runes: ({ filename }) => filename.split(/[/\\]/).includes('node_modules') ? undefined : true
+			},
+			adapter: adapter()
+		})
+	]
+});