Add arguments and output values for newVec3, vec3, etc

[darltrash]

Instead of adding a description like "This function takes the same arguments as Vec3:set.", Please add argument and output values for the constructors. This is very useful for auto-bindings. For example: Löwr

[bjornbytes]

Would you like to submit a pull request for this improvement?

[bjornbytes]

This is done