Co-authored-by: funcelot <artur.mustafin@gmail.com>

* Don't use DrawRect to clear an image, a pixel loop is an order of magnitude faster.

* Update ImageDrawRectangle to be faster too.

* Added a new utility function to get the current monitor.

Some of the other functions rely on passing on a monitor id but we only have a function for querying the count of monitors available.

* Updated the comment to correctly reflect the function action

This monitor should even probably be passed as an id instead to make it more consistent with the rest of the API but this would break existing applications so I am hesitant to change the function signature directly.

[raylua v3.5a](https://github.com/TSnake41/raylib-lua/releases/tag/v3.5a) has been released

[raylib-cpp](https://github.com/robloach/raylib-cpp) now targets raylib 3.5.0 as of [raylib-cpp 3.5.0-alpha1](https://github.com/RobLoach/raylib-cpp/releases/tag/v3.5.0-alpha1).

Sorry for that, At least i'm correct now ;)

* Add quadratic bezier to shapes.c

* Add DrawLineBezierQuad to header