Add initial project structure with configuration, printing, and routing functionality

- Created a new Rust project with Cargo configuration.
- Added `.gitignore` to exclude target directory.
- Implemented `Cargo.lock` for dependency management.
- Defined application configuration in `config/app.yaml` and `src/config.rs`.
- Developed printing logic in `src/printer.rs` using `cups_rs` for printer interactions.
- Established routing and request handling in `src/routes.rs` for health checks and print requests.
- Introduced a scheduler in `src/scheduler.rs` to manage print job distribution.
- Created models for print parameters and job responses in `src/models.rs`.
- Set up the main application entry point in `src/main.rs` with server initialization and configuration loading.
- Included necessary dependencies in `Cargo.toml` for async handling, tracing, and configuration management.

.gitignore

@@ -0,0 +1 @@
+/target