Add renderer frame capture contract

src/renderer_api/recording_renderer.h

@@ -14,6 +14,7 @@ enum class RecordedRenderCommandKind : std::uint8_t {
     bind_mesh,
     draw,
     read_texture,
+    capture_frame,
     end_render_pass,
     trace_marker,
 };
@@ -27,6 +28,7 @@ struct RecordedRenderCommand {
     TextureDesc texture_desc {};
     ReadbackRegion readback_region {};
     std::uint64_t readback_bytes = 0;
+    std::uint64_t capture_bytes = 0;
     const char* component = "";
     const char* name = "";
 };
@@ -91,6 +93,9 @@ public:
         ITexture2D& texture,
         ReadbackRegion region,
         IReadbackBuffer& destination) noexcept override;
+    [[nodiscard]] pp::foundation::Status capture_frame(
+        IRenderTarget& target,
+        IReadbackBuffer& destination) noexcept override;
     void end_render_pass() noexcept override;
 
     [[nodiscard]] bool in_render_pass() const noexcept;