Add C++17 Structured Bindings Support for r,g,b,a and s,t,p,q Member Vectors and Mat and Quat

[ZXShady]

This PR introduces structured bindings support for improved readability and allows for more concise code Key Changes:

• You are now allowed to use structured bindings even when GLM_FORCE_MEMBERS_XYZW macro is not defined fixing an inconsistency.
  • You can use structured bindings on mat and qua types

    
    // Before
    auto w  = obj.getSize().x; 
    auto h = obj.getSize().y; // calls getSize again.

// After auto [w, h] = obj.getSize();

```cpp
glm::vec3 v;
auto [x,y,z] = v; // used to be an error unless GLM_FORCE_MEMBERS_XYZW was defined

Structured bindings make the code more readable, especially when accessing multiple members of an temporary from a function call. It reduces verbosity.