feat(api): implement user authentication and registration endpoints

- Add main application logic in `api/src/main.rs` to initialize server, database, and services.
- Create authentication routes in `api/src/routes/auth.rs` for login, register, logout, and user info retrieval.
- Implement configuration route in `api/src/routes/config.rs` to expose application settings.
- Define application state management in `api/src/state.rs` to share user service and configuration.
- Set up Docker Compose configuration in `compose.yml` for backend, worker, and database services.
- Establish domain logic in `domain` crate with user entities, repositories, and services.
- Implement SQLite user repository in `infra/src/user_repository.rs` for user data persistence.
- Create database migration handling in `infra/src/db.rs` and session store in `infra/src/session_store.rs`.
- Add necessary dependencies and features in `Cargo.toml` files for both `domain` and `infra` crates.

infra/Cargo.toml

@@ -0,0 +1,34 @@
+[package]
+name = "infra"
+version = "0.1.0"
+edition = "2024"
+
+[features]
+default = ["sqlite", "broker-nats"]
+sqlite = ["sqlx/sqlite", "tower-sessions-sqlx-store/sqlite"]
+postgres = [
+    "sqlx/postgres",
+    "tower-sessions-sqlx-store/postgres",
+    "k-core/postgres",
+]
+broker-nats = ["dep:async-nats", "dep:futures-util"]
+
+[dependencies]
+k-core = { git = "https://git.gabrielkaszewski.dev/GKaszewski/k-core", features = [
+    "db-sqlx",
+] }
+domain = { path = "../domain" }
+async-trait = "0.1.89"
+chrono = { version = "0.4.42", features = ["serde"] }
+sqlx = { version = "0.8.6", features = ["runtime-tokio", "chrono", "migrate"] }
+thiserror = "2.0.17"
+tokio = { version = "1.48.0", features = ["full"] }
+tracing = "0.1"
+uuid = { version = "1.19.0", features = ["v4", "serde"] }
+tower-sessions = "0.14.0"
+tower-sessions-sqlx-store = { version = "0.15.0", default-features = false }
+serde_json = "1.0"
+serde = { version = "1.0", features = ["derive"] }
+async-nats = { version = "0.45", optional = true }
+futures-util = { version = "0.3", optional = true }
+futures-core = "0.3"