Implement missing typehint annotations

[chippmann]

Note: Not all of these annotations are really needed nor supported. Implement one by one as needed.

These typehint annotations are missing and should be implemented:

• [ ] Lenght

• [ ] Layers2DRenderer

• [ ] Layers2DPhysics

• [ ] Layers3DRender

• [ ] Layers3DPhysics

• [ ] ImageCompressLossy

• [ ] ImageCompressLossLess

• [ ] ObjectId

• [ ] TypeString

• [ ] NodePathToEditedNode

• [ ] MethodOfVariantType

• [ ] MethodOfBaseType

• [ ] MethodOfInstance

• [ ] MethodOfScript

• [ ] PropertyOfVariantType

• [ ] PropertyOfBaseType

• [ ] PropertyOfInstance

• [ ] PropertyOfScript

• [ ] ObjectTooBig

• [ ] NodePathValidTypes

• [ ] SaveFile

• [ ] IntIsObjectId

• [ ] Max