'GNU' GREP written in Rust.

I wrote this grep implementation in Rust as my first major project after tutorials. It isn't very complex but it works. I plan to improve it and implement all the available flags (modeling it after GNU grep) and eventually add support for reading input just like the real grep does. Feel free to submit a patch or improve the code—it will help me grow as a developer. I wanna write a lot of gnu's staff but in future. I only used the Vim for this project, so sorry about the readability.

• https://doc.rust-lang.org/book/ch12-00-an-io-project.html (Learning form this one)
• https://pl.wikipedia.org/wiki/Grep
• https://man7.org/linux/man-pages/man1/grep.1.html