[build] Code conventions auto-formatting with .clang-format -WIP-

[sakgoyal]

Fixes #5252 (comment)

TODO:

• Finalize the format. The current version is not perfect and is just here to provide an example on how to set it up. using this causes many files to change dramatically so it needs to be adjusted to better reflect the actual formatting used.
• can it be placed in a different location?
  • I don't want another file in the root directory that clutters it up more.

[raysan5]

@sakgoyal It would be great to have this option but I'm afraid this is not an easy task, still, let's see if it can be accomplished...