Simple command-line interface (CLI) application built in Rust, offering various utility features such as echoing input, concatenating files, listing directories, locating files or directories, and matching text in files.

• echo: Repeats the provided input.
• cat: Concatenates files.
• ls: Lists directories.
• find: Locates files or directories.
• grep: Matches text in files.

To use RustyToolbox, you need to have Rust installed. If you haven't already installed Rust, you can do so by following the instructions on Rust's official website.

• Implement unit tests to ensure the reliability of the codebase.
• Enhance error handling mechanisms to provide informative messages to users.
• Add support for multi-threading to improve performance, especially for tasks involving file operations.