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/app/src/persistence/user.rs

@@ -0,0 +1,28 @@
+use sea_orm::{ActiveModelTrait, ColumnTrait, DbConn, DbErr, EntityTrait, QueryFilter, Set};
+
+use models::domains::user;
+use models::params::user::CreateUserParams;
+use models::queries::user::UserQuery;
+
+pub async fn create_user(
+    db: &DbConn,
+    params: CreateUserParams,
+) -> Result<user::ActiveModel, DbErr> {
+    user::ActiveModel {
+        username: Set(params.username),
+        ..Default::default()
+    }
+    .save(db)
+    .await
+}
+
+pub async fn search_users(db: &DbConn, query: UserQuery) -> Result<Vec<user::Model>, DbErr> {
+    user::Entity::find()
+        .filter(user::Column::Username.contains(query.username.unwrap_or_default()))
+        .all(db)
+        .await
+}
+
+pub async fn get_user(db: &DbConn, id: i32) -> Result<Option<user::Model>, DbErr> {
+    user::Entity::find_by_id(id).one(db).await
+}