Add comprehensive tests for hackathon service functionality

- Implemented tests for creating, retrieving, updating, and deleting hackathons.
- Added validation tests for hackathon creation and updates.
- Included tests for hackathon events and timelines, ensuring proper handling of edge cases.
- Created tests for hackathon submissions, including validation and submission status updates.
- Organized tests into a dedicated module for better structure and maintainability.

imphnen-hackathon/Cargo.toml

@@ -0,0 +1,41 @@
+[package]
+name = "imphnen-hackathon"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]
+imphnen-libs.workspace = true
+imphnen-utils.workspace = true
+
+imphnen-entities.workspace = true
+async-trait.workspace = true
+axum.workspace = true
+serde.workspace = true
+serde_json = { workspace = true }
+oauth2 = { workspace = true }
+reqwest = { workspace = true, features = ["json"] }
+utoipa.workspace = true
+lazy_static.workspace = true
+regex.workspace = true
+validator.workspace = true
+axum-test.workspace = true
+surrealdb.workspace = true
+rand.workspace = true
+tokio.workspace = true
+chrono.workspace = true
+anyhow.workspace = true
+tower-http.workspace = true
+utoipa-swagger-ui.workspace = true
+strum.workspace = true
+strum_macros.workspace = true
+log.workspace = true
+once_cell.workspace = true
+tracing.workspace = true
+uuid.workspace = true
+axum-extra.workspace = true
+
+[dev-dependencies]
+dotenvy.workspace = true
+tokio-test = { workspace = true }
+mockall = { workspace = true }
+http-body-util.workspace = true