LibWeb/WebGL: Move extensions into their own folder

Author: https://github.com/Lubrsi
Commit: de77a5e3ea
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/3239
Reviewed-by: https://github.com/awesomekling
Reviewed-by: https://github.com/kalenikaliaksandr

Libraries/LibWeb/CMakeLists.txt

@@ -823,9 +823,10 @@ set(SOURCES
     WebDriver/Response.cpp
     WebDriver/Screenshot.cpp
     WebDriver/TimeoutsConfiguration.cpp
-    WebGL/ANGLEInstancedArrays.cpp
+    WebGL/Extensions/ANGLEInstancedArrays.cpp
+    WebGL/Extensions/OESVertexArrayObject.cpp
+    WebGL/Extensions/WebGLVertexArrayObjectOES.cpp
     WebGL/EventNames.cpp
-    WebGL/OESVertexArrayObject.cpp
     WebGL/OpenGLContext.cpp
     WebGL/WebGL2RenderingContext.cpp
     WebGL/WebGLActiveInfo.cpp
@@ -846,7 +847,6 @@ set(SOURCES
     WebGL/WebGLTransformFeedback.cpp
     WebGL/WebGLUniformLocation.cpp
     WebGL/WebGLVertexArrayObject.cpp
-    WebGL/WebGLVertexArrayObjectOES.cpp
     WebIDL/AbstractOperations.cpp
     WebIDL/Buffers.cpp
     WebIDL/CallbackType.cpp