[feature] Implement texture scaling

[Derpius]

Is your feature request related to a problem? Please describe.
Textures are incorrectly scaled on many surfaces

Describe the solution you'd like
Multiply UV coordinates by the texture transforms before being used in sampling and texture LoD calculations

Additional context
Code from the Source SDK for initialising a 2x4 mat from a 3x4 mat

void CBaseVSShader::SetVertexShaderTextureTransform( int vertexReg, int transformVar )
{
	Vector4D transformation[2];
	IMaterialVar* pTransformationVar = s_ppParams[transformVar];
	if (pTransformationVar && (pTransformationVar->GetType() == MATERIAL_VAR_TYPE_MATRIX))
	{
		const VMatrix &mat = pTransformationVar->GetMatrixValue();
		transformation[0].Init( mat[0][0], mat[0][1], mat[0][2], mat[0][3] );
		transformation[1].Init( mat[1][0], mat[1][1], mat[1][2], mat[1][3] );
	}
	else
	{
		transformation[0].Init( 1.0f, 0.0f, 0.0f, 0.0f );
		transformation[1].Init( 0.0f, 1.0f, 0.0f, 0.0f );
	}
	s_pShaderAPI->SetVertexShaderConstant( vertexReg, transformation[0].Base(), 2 ); 
}

[Derpius]

Implemented, need to test

[Derpius]

Transformation is completely incorrect

[Derpius]

Added in 15fa7e8