feat: 初始化 SvelteKit 项目基础结构和示例组件

- 添加项目配置文件（.npmrc, pnpm-workspace.yaml, prettier 配置等）
- 设置基础路由和布局组件
- 实现示例组件展示 Svelte 5 新特性（$state, $derived 等）
- 配置测试环境（单元测试和 E2E 测试）
- 添加静态资源和 favicon

vite.config.ts

@@ -0,0 +1,42 @@
+import devtoolsJson from 'vite-plugin-devtools-json';
+import { defineConfig } from 'vitest/config';
+import { playwright } from '@vitest/browser-playwright';
+import { sveltekit } from '@sveltejs/kit/vite';
+
+export default defineConfig({
+	plugins: [sveltekit(), devtoolsJson()],
+
+	test: {
+		expect: { requireAssertions: true },
+
+		projects: [
+			{
+				extends: './vite.config.ts',
+
+				test: {
+					name: 'client',
+
+					browser: {
+						enabled: true,
+						provider: playwright(),
+						instances: [{ browser: 'chromium', headless: true }]
+					},
+
+					include: ['src/**/*.svelte.{test,spec}.{js,ts}'],
+					exclude: ['src/lib/server/**']
+				}
+			},
+
+			{
+				extends: './vite.config.ts',
+
+				test: {
+					name: 'server',
+					environment: 'node',
+					include: ['src/**/*.{test,spec}.{js,ts}'],
+					exclude: ['src/**/*.svelte.{test,spec}.{js,ts}']
+				}
+			}
+		]
+	}
+});