* Added rudimentary SVG support. Added 2 functions ImageLoadSvg and ImageLoadSvgWithSize.
* Added an example on how to use ImageLoadSvgWithSize and adjusted Makefiles accordingly.
* Added actual correct example file.
* Reviewed the code to keep the raylib coding conventions in mind.
Moved the LoadImageSvg() code into LoadImage() guarded by SUPPORT_FILEFORMAT_SVG.
Renamed LoadImageSvgWithSize() to LoadImageSvg().
Added a LoadImageSvgFromString() function to parse the loaded SVG into an actual image. This does the bulk of the work.
* Fixed typo.
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Co-authored-by: Ray <raysan5@gmail.com>