feat: initialize Vue 3 project with Tailwind CSS and Vite

- Add package.json with project metadata and dependencies
- Create favicon.ico and ritsu.png assets
- Implement main App.vue component with site structure
- Add HeroSection, RitsuSection, SiteHeader, and SupportSection components
- Set up theme toggle functionality in SiteHeader
- Create main entry point in main.ts
- Add Tailwind CSS styles in style.css
- Configure TypeScript with tsconfig files
- Set up Vite configuration for Vue and Tailwind CSS

vite.config.ts

@@ -0,0 +1,8 @@
+import { defineConfig } from 'vite'
+import vue from '@vitejs/plugin-vue'
+import tailwindcss from '@tailwindcss/vite'
+
+// https://vite.dev/config/
+export default defineConfig({
+  plugins: [vue(), tailwindcss()],
+})