* added MixColors function to mix 2 colors together (Line 1428 raylib.h and Line 4995 in rtextures.c)

* renamed MixColors to ColorLerp (https://github.com/raysan5/raylib/pull/4310#issuecomment-2340121038)

* changed ColorLerp to be more like other functions

---------

Co-authored-by: CI <-ci@not-real.com>

Fix following gcc warnings when SVG enabled:

rtextures.c: In function 'LoadImageSvg':
rtextures.c:374:52: warning: pointer targets in passing argument 1 of 'nsvgParse' differ in signedness [-Wpointer-sign]
  374 |             struct NSVGimage *svgImage = nsvgParse(fileData, "px", 96.0f);
      |                                                    ^~~~~~~~
      |                                                    |
      |                                                    unsigned char *
In file included from rtextures.c:230:
external/nanosvg.h:2952:28: note: expected 'char *' but argument is of type 'unsigned char *'
 2952 | NSVGimage* nsvgParse(char* input, const char* units, float dpi)
      |                      ~~~~~~^~~~~
rtextures.c:407:43: warning: comparison of distinct pointer types lacks a cast [-Wcompare-distinct-pointer-types]
  407 |         if (isSvgStringValid && (fileData != fileNameOrString)) UnloadFileData(fileData);
      |                                           ^~
rtextures.c: In function 'LoadImageFromMemory':
rtextures.c:614:52: warning: passing argument 1 of 'nsvgParse' discards 'const' qualifier from pointer target type [-Wdiscarded-qualifiers]
  614 |             struct NSVGimage *svgImage = nsvgParse(fileData, "px", 96.0f);
      |                                                    ^~~~~~~~
external/nanosvg.h:2952:28: note: expected 'char *' but argument is of type 'const unsigned char *'
 2952 | NSVGimage* nsvgParse(char* input, const char* units, float dpi)
      |                      ~~~~~~^~~~~

* Adds log warnings on invalid file data

* Separate error on missing file extension

* Changed LOG_ERROR to LOG_WARNING

---------

Co-authored-by: Jutastre <pukarlindgren@gmail.com>

* Update raylib_api.* by CI

* Fix MSVC warnings.
Make raymath.h work in C++ in MSVC

* whitespace cleanup

---------

Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>

Some formats are not advancing k to get pixels values

* created ImageFromChannel

Adds the possibility to extract a specific channel from an image

* naming convention

* example window height

* removed threshold

* removed alpha channel

* channel example organization

* updated channel example image

* Update raylib_api.* by CI

* Fix warnings when building examples in MSVC 2022

* fix auto-format that sneaked in there.

---------

Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>

* adding `ImageDrawLineEx` function
also review other functions for drawing lines in images

* fix `ImageDrawLineV`

* adding triangle drawing function for images

* remove unnecessary check

* fix an iteration mistake

- Review formatting
 - Improve readability for some functions result return
 - Minimize early returns
 - Align LoadFileData() to UnloadFileData()