Gsc rescale models

[Santahunter]

Hey, Ive added some more core GSC functions to rescale models as you like.

I think Im going to make a pull request to IW4x soon. Many things and mods can benefit from this.

For example some people may like to resize their warzone zone barrier with it 😉

New Functions are:

resizeModels(<xmodelName>, <factor>, [time])
resetModels(<xmodelName>, [time])
<entity> resizeModel(<factor>, [time])
<entity> resetModel([time])

ResizeModel()

resizes an object by a new factor.
obj resizeModel(<sizeFactor>, <timeInSeconds>); // time parameter is optional, empty or 0 means instant

e.g.

obj = spawn("script_model", self.origin);
obj setModel("zw2_alduin");
obj resizeModel(3, 4); 
// Object becomes 3x as big within 4 seconds with a transition.
// You can also enter values below 1 like 0.5 to shrink the model by 50%

ResetModel()

obj resetModel(<time>); // resets a model to its vanilla size within time. time param is also optional here.

ResizeModels()

Resizes all current and future models with that name to a new size

resizeModels(<name>, <sizeFactor>, <time>); // time optional

e.g.
resizeModels("zw2_alduin", 30, 5);

ResetModels()

resets all current and future models with that name within given time
resetModels("zw2_alduin", 3); // time optional, if you read it till here I think you got it

Reproducable GSC Code for testing:

scale.txt

[wroyca]

Could we split these changes into a few smaller PRs? It's a bit too large to review effectively as one batch