fix app icon in nuitka build process and remove settings pngs

.github/workflows/dev.yml

@@ -100,6 +100,17 @@ jobs:
           echo "UPX_BINARY=$UPX_DIR/upx.exe" >> $GITHUB_ENV
           upx --version | head -1
 
+      - name: Convert icon for Windows
+        if: runner.os == 'Windows'
+        shell: bash
+        run: |
+          python -c "
+          from PIL import Image
+          img = Image.open('src/core/interface/assets/logo.png')
+          img.save('app_icon.ico', format='ICO', sizes=[(256,256),(128,128),(64,64),(48,48),(32,32),(16,16)])
+          print('Icon converted successfully')
+          "
+
       - name: Build with Nuitka (Windows)
         if: runner.os == 'Windows'
         shell: bash