Expose PLATFORM_WEB_RGFW to cmake (#5579)

Author: Crisspl

cmake/LibraryConfigurations.cmake

@@ -167,6 +167,11 @@ elseif ("${PLATFORM}" MATCHES "RGFW")
 
         set(LIBS_PRIVATE ${X11_LIBRARIES} ${OPENGL_LIBRARIES})
     endif ()
+
+elseif ("${PLATFORM}" MATCHES "WebRGFW")
+    set(PLATFORM_CPP "PLATFORM_WEB_RGFW")
+    set(GRAPHICS "GRAPHICS_API_OPENGL_ES2")
+    set(CMAKE_STATIC_LIBRARY_SUFFIX ".a")
 endif ()
 
 if (NOT ${OPENGL_VERSION} MATCHES "OFF")