chore: establish typed SvelteKit frontend foundation

vite.config.ts

@@ -0,0 +1,24 @@
+import tailwindcss from '@tailwindcss/vite';
+import { sveltekit } from '@sveltejs/kit/vite';
+import { defineConfig } from 'vitest/config';
+
+export default defineConfig({
+  plugins: [tailwindcss(), sveltekit()],
+  server: {
+    host: '127.0.0.1',
+    port: 5173,
+    proxy: {
+      '/api': {
+        target: 'http://127.0.0.1:8080',
+        changeOrigin: false,
+      },
+    },
+  },
+  test: {
+    environment: 'jsdom',
+    include: ['src/**/*.test.ts'],
+    setupFiles: ['./vitest-setup.ts'],
+    pool: 'threads',
+    maxWorkers: 1,
+  },
+});