explicitely allow global hooks

[Konfekt]

I am using global hooks falling back to local hooks; temporarily disabling them, then prek install makes them work fine.
Any chance to take account of this instead of

prek/crates/prek/src/cli/install.rs

Line 40 in c741c8c

"Cowardly refusing to install hooks with `core.hooksPath` set.\nhint: Run these commands to remove core.hooksPath:\nhint: {}\nhint: {}",

?

[j178]

duplicate of #23

[Konfekt]

I think it'd be better to give a clear explanation and instructions if we detect a non-default core.hooksPath for now.

Are these those clear instruction?

"Cowardly refusing to install hooks with `core.hooksPath` set.\nhint: Run these commands to remove core.hooksPath:\nhint:   {}\nhint:   {}",

Point was rather (instructions on how) to temporarily work around them instead of removing them globally

[domenkozar]

It would be great if installation was idempotent, at least that's how it worked using pre-commit hooks.

In devenv tasks we switch to prek and it's now annoyingly always complaining about