Work at 3ds support and backend upgrades

- Track textures (not sure if this is done tbh)
- Add lithium formatters and move TextureID, TextureFormat and TextureFilter to lithium
- Only include gl-helper if any glDriver is included
- Add Li::Rect for UV stuff
- Add Li::Texture as Info holder (still thinking of making them to ptrs
- Add Check if textures are still loaded on exit

backends/include/pd_system/gfx_opengl3.hpp

@@ -25,10 +25,11 @@ class GfxOpenGL3 : public GfxDriverBase<GfxOpenGL3Config> {
   void Submit(size_t count, size_t start) override;
   void BindTexture(TextureID id) override;
   void SysReset() override;
-  TextureID LoadTexture(const std::vector<PD::u8>& pixels, int w, int h,
-                        TextureFormat type = TextureFormat::RGBA32,
-                        TextureFilter filter = TextureFilter::Linear) override;
-  void DeleteTexture(const TextureID& tex) override;
+  Li::Texture LoadTexture(
+      const std::vector<PD::u8>& pixels, int w, int h,
+      TextureFormat type = TextureFormat::RGBA32,
+      TextureFilter filter = TextureFilter::Linear) override;
+  void DeleteTexture(const Li::Texture& tex) override;
 
  private:
   u32 pShader = 0;