Develop a tool for adding local watermarks.

Develop a tool for adding local watermarks.
Functions:
1. Choose “Add Image” or simply drag the image into the window.
2. Choose the type of watermark (text/image).
3. Set the watermark parameters.
4. Select the output directory.
5. Click the “Start Processing” button.
6. After processing is complete, view the results in the output directory.