feat: initialize thoughts-frontend with Next.js, TypeScript, and ESLint

- Add ESLint configuration for Next.js and TypeScript support.
- Create Next.js configuration file with standalone output option.
- Initialize package.json with scripts for development, build, and linting.
- Set up PostCSS configuration for Tailwind CSS.
- Add SVG assets for UI components.
- Create TypeScript configuration for strict type checking and module resolution.

thoughts-backend/tests/app/persistence/mod.rs

@@ -0,0 +1,26 @@
+use utils::testing::setup_test_db;
+
+mod blog;
+mod user;
+
+use blog::test_blog;
+use user::test_user;
+
+#[tokio::test]
+async fn user_main() {
+    let db = setup_test_db("sqlite::memory:")
+        .await
+        .expect("Set up db failed!");
+
+    test_user(&db).await;
+}
+
+#[tokio::test]
+async fn blog_main() {
+    let db = setup_test_db("sqlite::memory:")
+        .await
+        .expect("Set up db failed!");
+
+    test_user(&db).await;
+    test_blog(&db).await;
+}