feat: download and install k3d latest release

- Implemented functionality to fetch the latest k3d release tag from GitHub.
- Added logic to determine the appropriate binary URL based on the current platform.
- Implemented downloading and saving the binary to a specified directory.
- Included unit tests to verify the download and installation process.
- Added a `K3D_BIN_FILE_NAME` constant for clarity.
- Added logging for better debugging.

Cargo.toml

@@ -23,7 +23,7 @@ log = "0.4.22"
 env_logger = "0.11.5"
 derive-new = "0.7.0"
 async-trait = "0.1.82"
-tokio = { version = "1.40.0", features = ["io-std", "fs"] }
+tokio = { version = "1.40.0", features = ["io-std", "fs", "macros", "rt-multi-thread"] }
 cidr = "0.2.3"
 russh = "0.45.0"
 russh-keys = "0.45.0"