i made this to train my rust skills

This is a cli program, wich means you need to execute it using .\searcher_txt.exe on windows and ./searcher_txt on linux and MacOS
The arguments needed are the query, filename and case sensitivity Example for searching "potato" in file.txt with no case sensitivity on windows :

.\searcher_txt potato file.txt false

If you want your search to be case sensitive :

.\searcher_txt potato file.txt true

If you're on linux or MacOS, replace the \ by /

1.2.3 : Small optimizations

1.2.2 : Case sensitivity is now an argument

1.2.1 : Better error messages

1.2.0 : Added back case sensitivity option

1.1.0 : Fixed some errors

1.0.0 : Basic code (with errors)