* Create ParseConfigHeader.cmake

This script parses the config.h file to automate the process of exposing the configuration flags and configuration values found in the latter.

* Update CompileDefinitions.cmake

Makes use of the new functionality found in ParseConfigHeader.cmake to make things consistent.

* Update CMakeOptions.txt

Makes use of the new functionality found in ParseConfigHeader.cmake to make things consistent.

* Update CMakeLists.txt

Changes required to make possible building raylib for web on Windows 10.

* Update LibraryConfigurations.cmake

Removes a warning that linker-only flags were being passed to the compiler, which is in accordance to https://emscripten.org/docs/tools_reference/settings_reference.html.

* Update CMakeOptions.txt

Removed clutter.

* Update CompileDefinitions.cmake

Removed clutter.

* Update CompileDefinitions.cmake

Some applications might check for PLATFORM_WEB instead of __EMSCRIPTEN__.

* Update CompileDefinitions.cmake

Reverting

* Update CMakeLists.txt

USE_AUDIO is redundant in the presence of the already existent and more descriptive SUPPORT_MODULE_RAUDIO.

* Update CompileDefinitions.cmake

USE_AUDIO is redundant in the presence of the already existent and more descriptive SUPPORT_MODULE_RAUDIO.

* Update ParseConfigHeader.cmake

* Revert "Update CMakeLists.txt"

This reverts commit 1785fc06b5.

* Revert "Update CompileDefinitions.cmake"

This reverts commit 62f9a3a0ea.

* Revert "Update CMakeLists.txt"

This reverts commit 3e7912144e.

* Revert "Update LibraryConfigurations.cmake"

This reverts commit bcc4310c49.

* Fix several non-functional `target_compile_definitions`

* Avoid hardcoding the default vertex attribute locations

* Implement functional `rlNormal3f`

* Add normal definitions for `DrawCube`

* Update the basic lighting example to use `DrawCube` and `DrawPlane`

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.

This fixes compilation and linking errors when CUSTOMIZE_BUILD is
ON. Any option wasn't actually applied if it wasn't in this list.

I also added a message which makes it a bit easier to confirm you have
successfully enabled an option.

* Update CMakeOptions.txt

* Update config.h.in

* Added SUPPORT_STANDARD_FILEIO to CMakeOptions.txt

* Fixed typo

* Added SUPPORT_STANDARD_FILEIO to CompileDefinitions.cmake

Co-authored-by: KirottuM <kirottum@protonmail.com>

CMake relied on this file for configurations and also was interfering in the regular config.h by having a separate definition if building with CMake. This was not entirely correct so instead we will define compile time definitions separately through CMake (CompileDefinitions.cmake) and also will use the provided EXTERNAL_CONFIG_FLAGS that I found that will not use config.h in through the build process.

I also introduced a new compiler option (CUSTOMIZE_BUILD) that when OFF will use the default config.h and when ON will show other options for redefining your own options.

Fixed an error in rlgl.h where if you have both RLGL_STANDALONE and SUPPORT_VR_SIMULATOR you get a compile time error.