Add auto-formating tools (scripts)

[T-Maxxx]

@callofduty4x/dev

• [ ] Discuss further coding style for repository. (On forum)
• [ ] Choose auto-formatting tool.
• [ ] Prepare script for chosen tool with rules for auto formatting.
• [ ] Update docs (how to use).
• [ ] ~Do formatting when building automatically (need to discuss, may break building process for newcomers as will require one additional tool)~

[D4edalus]

using some kind of autoformatting tool would be useful. some files are quite messy .. i only know of clang-format. can you suggest any?

i would rather avoid having such a tool run automatically and push to our repos. in my experience they tend to often enough break things.