LibWeb/WebGL: Implement the EXT_texture_filter_anisotropic extension

Author: https://github.com/Lubrsi
Commit: b15f4424f9
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/6521
Reviewed-by: https://github.com/gmta ✅

Libraries/LibWeb/WebGL/WebGLRenderingContextBase.h

@@ -26,6 +26,7 @@ public:
     virtual GC::Cell const* gc_cell() const = 0;
     virtual void visit_edges(JS::Cell::Visitor&) = 0;
     virtual OpenGLContext& context() = 0;
+    virtual bool ext_texture_filter_anisotropic_extension_enabled() const = 0;
 
     static Span<float> span_from_float32_list(Float32List& float32_list)
     {