Adds the `tracing` and `md5` crates to the project, enabling enhanced
logging and cryptographic hashing capabilities. Includes `TraceLayer`
for HTTP request tracing and configures `tracing-subscriber` with
`EnvFilter`.
This commit introduces the foundational elements of the project:
- `.gitignore` file to exclude build artifacts and environment
variables.
- `Cargo.lock` and `Cargo.toml` defining project dependencies and
metadata.
- `diesel.toml` for Diesel CLI configuration.
- Initial migration files (`down.sql`, `up.sql`) for database schema
setup.
- `rustfmt.toml` for code formatting.
- Basic module structure for database, routes, schema, state, and types.
- `src/main.rs` with basic Axum server setup and dotenv loading.
- `src/routes/system_router.rs` for basic API endpoint.
- `src/state.rs` for managing application state and database connection
pool.
- Type definitions for Subsonic API responses and extensions.
