Added [Mod creator] and [Rename for game engines] features

[yCoffeeGames]

The branch is based on 4.1 (commit 249a101)

[Mod creator] Create mods for game using decimate modifier. Many customizable properties provided [Rename for game engines] UE and some engines dont support '.' in names

Operators are located at Files menu

[passivestar]

Hey, thanks for making this. I'd rather not add software-specific buttons (auto-lod generation is often handled on the game engine side and the name function is too specific as well), otherwise it'll get bloated fast. In the past I moved substance-specific functionality into a separate addon for this same reason

Note that you can add third-party operators to quickmenu config, they don't have to be the qm. ones, they can be your own operators from your own addon