mntime 0.3.0

Execute "m" commands "n" times to calculate mean of usage time and memory. As an alternative to "time", "gnu-time" is used internally.
Documentation
< /*!
> ![demo](docs/demo.gif)
< ![demo](https://raw.githubusercontent.com/arkbig/mntime/main/docs/demo.gif)
> For project:
> 
> <details><summary>For personal:</summary>
> 
> - Study the Rust language.
> - Learn how to create TUI tool.
> - Learn how to use git and GitHub
> 
> Yes, I am a new Rustacean, a professional programmer who usually uses C++, C# as language and Perforce for version control.
> </details>
> 
> ```sh
> cargo license --direct-deps-only --avoid-build-deps --avoid-dev-deps | awk -F ":" 'BEGIN {printf "|License|crate|\n|-|-|\n"} {printf "|%s|%s|\n", $1, $2}'
> ```
> 
> ```sh
> cargo license --avoid-build-deps --avoid-dev-deps | awk -F ":" 'BEGIN {printf "|License|crate|\n|-|-|\n"} {printf "|%s|%s|\n", $1, $2}'
> ```
> 
< */