Simple CLI tool for POSIX-like commands - `head` and `tail`.
In order to install this tool, run the following command:
```
cargo install ju-tcs-tbop-24-jfk
```
In general, the command looks as follows:
```
ju-tcs-tbop-24-jfk [head/tail] <n> <file>
```
As a result, the first (or last respectively) `n` lines of file `file` will be printed to standard output.