refactor: replace panic with a graceful exit (#4402)

* refactor: replace panic with a graceful exit

* fix: clippy errors

* fix: typo

* Update src/main.rs

Co-authored-by: Stefan Melmuk <509385+stefan0xC@users.noreply.github.com>

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Co-authored-by: Stefan Melmuk <509385+stefan0xC@users.noreply.github.com>