These IsReady() functions provide a method in order to verify whether or not the object was loaded successfully. They're useful to make sure the assets are there prior to using them.

Ran into an issue in raylib-cpp where a user was using raylib 4.5-dev, even though the library currently only targets 4.2. With having RAYLIB_VERSION_MAJOR and RAYLIB_VERSION_MINOR, we will be able to target different versions of raylib in different ways, via C preprocessor conditionals.

For example:
``` c
newColor = ColorTint(BLUE, RED);
TraceLog(LOG_INFO, "The color should be tinted, but this isn't supported in ryalib <= 4.2");
```

WARNING: It could require further review of `GamepadThread()` function where `js_event gamepadEvent.number` detecting current pressed button could generate a missmatch with index 0 (reserved for button unknow). Or maybe `0` could just be `GAMEPAD_BUTTON_NONE`? In that case, consistency with other inputs should be carefully considered...

* Update year to 2023

* Update raylib.h year to 2023

Those two functions have been moved to a new example: `models_draw_cube_texture`. The reasons for this decision:
 - Function inflexibility: Many users with the need to draw a textured cube could need to customize the texture applied to every face, that function did not allow that kind of functionality.
 - rlgl functionality exposure: The implementation exposed will teach users how to implement custom textured triangles drawing.

This function implementation has been moved to the related example. Current implementation can be probably customized depending on user needs.

This function can be easely replicated using `DrawtexturePro()` and actually it was doing some assumptions not transparent to the user. Even the function name was confusing. No example was available for it and actually noone requested one example.

Function moved to `examples/textures/textures_polygon.c`, so users can learn from the implementation and create custom variants as required.

* Added Box and Gaussian blurring

* Removed dependence of gaussian blur to box blur & Fixed precision errors

Co-authored-by: nobytesgiven <nobytesgiven@users.noreply.github.com>

* Add DrawCapsule & DrawCapsuleWires

* Add DrawCapsule & DrawCapsuleWires to example

Co-authored-by: Ian Band <ian.r.band@gmail.com>

Probably useless but interesting for education. It generated a grayscale image directly from text data.

- ADDED: `GetCodepointPrevious()`
 - RENAMED: `GetCodepoint()` -> `GetCodepointNext()`, actually, reimplemented
 - `GetCodepoint()` has been kept for the moment, for compatibility and also because implementation is different
 - RENAMED: `TextCodepointsToUTF8()` to `LoadUTF8()`, simpler name and more aligned with raylib conventions (functions loading memory start with Load*()), parameters should be descriptive of functionailty.
 - ADDED: `UnloadUTF8()`, aligned with `LoadUTF8()` to avoid allocators issues.

This adds `ImageDrawCircleLines()` and `ImageDrawCircleLinesV()` to draw outlines of circles, and updates `ImageDrawCircle()` draw a filled circle to match the effect of `DrawCircle()` and `DrawCircleLines()`.

* Update raylib.h

* CheckCollisionPointPolygon()

* typo

* Fix Undefined Symbol `_ftelli64`

* Add files via upload

* Update raylib.h

* Update raylib.h

Those functions were platform dependent and user has no control over the file created. They have been removed from raylib and just moved to `core_storage_values` example.

(GetMouseWheelMoveV).

REDESIGNED: `LoadDirectoryFiles()`
ADDED: `LoadDirectoryFilesEx()`
REDESIGNED: `LoadDroppedFiles()`
ADDED: `IsPathFile()`

This BIG BREAKING change simplifies the functions and gives more control to the user:
 - A new `struct FilePathList` has been added to avoid exposing complex pointers.
 - User is responsible of memory loading/unloading
 - Filepaths loading support recursive directories and file extension filters

* GetMonitorWidth()/GetMonitorHeight(): current video resolution instead max available

* adapt header comment to reflect change

RENAMED: `ClearDroppedFiles()` to `UnloadDroppedFiles()`

RENAMED: `ClearDirectoryFiles()` to `UnloadDirectoryFiles()`