Fix clippy lints and add pre-commit hooks

[LanHikari22]

• Added an additional note on update blocking on line read
• Added small modifications to make sure all clippy lints pass
• Add pre-commit hooks and documentation on its setup to ensure tests, formatting, and lints pass before commit
• Fixed update signaling it can be reused when shell is terminated

It was previously failing in this github workflow job.

[Utagai]

Just commenting here to say that I've seen the PR, but haven't had a chance to review. I will do so as soon as I can!

[Utagai]

Man, it is a little embarrassing to see some of my earliest Rust code from way back when. Thanks for going through and fixing/cleaning up a bunch of stuff. I put a few comments, but I don't think any of them are major.

[Utagai]

Thanks for the recent changes.

The last things would be:

• See my comment about _quotation; we should see if we can just remove that variable if its not doing anything useful.
• Regarding tarpaulin, I'd see if you can figure out what the situation there is... ideally, we can just remove the lint rule and be fine, but if there's issues without that rule we should understand why.

This PR looks basically great to me minus the two items above, and both of those items are not dealbreakers.

For your information, I will be away on travel until 9/25. My responses in this PR may be delayed.

[Utagai]

Sorry for the delay, but this looks great. Thanks!