Parses a Hex string color into an RGB format vector
The hex "#" is optional, and it can have any length, however only the first 6 hex digits are evaluated, short hex (length 3) is also supported
For example, "#42" is the same as "420000", and "F0B" is the same as "FF00BB"
  overload 1:
                        
vectors.hexToRGB(hex)  
  | Method Property | Fluent Description | Representation | 
|---|
 | hex accepts | a String |  | 
| Return Value | a Vector3 |  |