Recursively search the config file

[jooaodanieel]

GCommit works based on a config file placed at the same folder where .git is.
Although, sometimes we're committing from a deeper directory.

In this issue, we're asking for contributions to
search the config file in the current directory and recursively in the parent

note: don't forget to update the README accordingly 🚀

[T-Guerrero]

I'd like to work on this issue