Disable setting panic hook

[ten3roberts]

Add an option for the builder to disable the setting the panic hook, and only setting the eyre hook.

This is useful for targeting the web where you may already use console_error_panic_hook

[ten3roberts]

Workaround:

let (_, eyre_hook) = color_eyre::config::HookBuilder::default().into_hooks();
eyre_hook.install().unwrap();

[MolotovCherry]

I was encountering an issue with their tracing example, cause I had other error handlers initiated. This helped me, since I wanted to only enable the panic hook but not the error hook. Same principle above, except .0 instead of .1. Thanks!

Edit: Figured out the issue, for some reason using eyre (eyre!() and Result) before setting the hooks somehow caused a hook to get set, even though I never set it. That caused the error hook to error out as it was already "set"