[BUG] - Crash when local directory does not exist

[acpoppe]

Description

When trying to connect, at least through SCP, to a remote host, the application will crash if the provided Default Local Working Directory does not exist.

Steps to reproduce

1. Enter a non-existent directory in the Default Local Working Directory text box
2. Fill in connection details for the remote host
3. Press Enter

Expected behaviour

A clear and concise description of what you expected to happen.

Environment

• OS: MacOS
• Architecture: Arm
• Rust version: 1.83
• termscp version: 0.16.1
• Protocol used: SCP
• Remote server version and name: Any

Log

thread 'main' panicked at src/filetransfer/host_bridge_builder.rs:14:47: Failed to create Localhost: HostError { error: NoSuchFileOrDirectory, ioerr: None, path: Some("/as;dfasdf") } note: run with RUST_BACKTRACE=1 environment variable to display a backtrace