test: add playwright (resolves #12)

package.json

@@ -12,6 +12,8 @@
 		"check:watch": "svelte-kit sync && svelte-check --tsconfig ./tsconfig.json --watch",
 		"format": "prettier --write .",
 		"lint": "prettier --check . && eslint .",
+		"test": "npm run test:e2e",
+		"test:e2e": "playwright test",
 		"db:start": "docker compose up",
 		"db:push": "drizzle-kit push",
 		"db:generate": "drizzle-kit generate",
@@ -24,6 +26,7 @@
 		"@eslint/compat": "^1.4.1",
 		"@eslint/js": "^9.39.1",
 		"@flowbite-svelte-plugins/texteditor": "^0.25.6",
+		"@playwright/test": "^1.59.1",
 		"@sveltejs/adapter-node": "^5.4.0",
 		"@sveltejs/kit": "^2.49.0",
 		"@sveltejs/vite-plugin-svelte": "^6.2.1",