Improve error handling, optimize history management, and update utili…

…ty commands (#4)

* feat: enhance error handling and debug logging

* fix: update grep command in remove_history to handle leading dashes

* refactor: replace 'tail -r' with a 'sed' command to reverse the order

* refactor: standardize debug and history limit variables

* chore: refactor history management and update documentation

* refactor: reorganize variable definitions and optimize history handling