Add clipboard widget with history, search, and image support

[stylebending]

Summary

This PR adds a new clipboard widget to YASB, providing a searchable clipboard history with long text preview and support for both text and images.

Features

Built-in search bar.

Preview long text per history item by hovering over it.

Full support for copying and previewing images directly in the history list.

This is my first contribution of this size to a free and open-source project, so any feedback (code, structure, or UX) is very welcome 🙂

Tested with both text and image clipboard content on Windows 11.

[amnweb]

Isn't it better to use the official API to access Windows clipboard data in realtime? https://learn.microsoft.com/en-us/windows/win32/dataxchg/clipboard

[stylebending]

Isn't it better to use the official API to access Windows clipboard data in realtime? https://learn.microsoft.com/en-us/windows/win32/dataxchg/clipboard

Thanks for the suggestion and the link! That makes sense, and I agree that using the official Windows clipboard API is the better approach for real-time access.

Would you prefer that I update this PR with the new approach, or close it and open a fresh one once the changes are ready?

[amnweb]

Would you prefer that I update this PR with the new approach, or close it and open a fresh one once the changes are ready?

As you wish, your choice.