Install only desired hooks

[minuscorp]

This PR adds the ability to install all the hooks as it was before or specify the list by a whitespace separated list the names of the commits that the user wants to be installed.

[orta]

Interesting, seems fine - what's the use case for only installing a subset of the hooks?

[minuscorp]

In our case, for some users using Git GUIs, they're getting strange status codes when executing empty hooks, also, we also manage some subset of hooks outside of Komondor's domain, which is not allowed now because it is overwritten by Komondor, even if you could delete and replace those files. Just to let the teams introduce a subset of hooks when they need them instead of having Komondor having written them all.

Also, people like us that vendor a dynamic library with hooks which source is opaque for the developer, we want to introduce them gradually without having to release a new library and recompile everything from scratch.

[orta]

👍🏻 sounds good to me then