Ensure that code formatting and style is consistent

[aperezdc]

Code style more or less follows that of GLib. It would be good to make sure that all the files are formatted accordingly. For example platform/cog-platform-fdo.c has many instances of missing spaces between function names and the opening parenthesis for the argument list.

[aperezdc]

It seems that there are no tools which would do GLib style 100% correctly, but for example the GNOME Web repository has a configuration file for Uncrustify which looks like a good starting point (thanks to @mcatanzaro for pointing it out).

[Cwiiis]

We now have both CI code style checking and a pre-commit hook that checks style - given that a PR to correct all existing mistakes was rejected, is it safe to say that there's nothing left to do here?

[aperezdc]

@Cwiiis: you are right, I also think we can close this 👍🏼