Remove clipboard functionality and enhance performance monitoring features

- Deleted clipboard-related files (clipboard.cc, clipboard.h, clipboard.mm) to streamline the codebase.
- Added a performance dashboard in the EditorManager to monitor performance metrics and improve user experience.
- Integrated performance monitoring capabilities across various editors, allowing for detailed timing of critical operations.
- Updated the graphics system with batch processing for texture updates, significantly improving rendering performance.
- Introduced a memory pool allocator for efficient memory management during graphics operations.

src/app/gfx/bitmap.h

@@ -143,6 +143,13 @@ class Bitmap {
    */
   void UpdateTexture(SDL_Renderer *renderer);
 
+  /**
+   * @brief Queue texture update for batch processing (improved performance)
+   * @param renderer SDL renderer for texture operations
+   * @note Use this for better performance when multiple textures need updating
+   */
+  void QueueTextureUpdate(SDL_Renderer *renderer);
+
   /**
    * @brief Updates the texture data from the surface
    */
@@ -305,7 +312,7 @@ class Bitmap {
    * @param color ImVec4 color to hash
    * @return 32-bit hash value
    */
-  uint32_t HashColor(const ImVec4& color) const;
+  static uint32_t HashColor(const ImVec4& color);
 };
 
 // Type alias for a table of bitmaps