This commit introduces a standalone proof-of-concept (POC) for screen
capture on Wayland using PipeWire and xdg-desktop-portal.
The POC demonstrates:
- Initializing PipeWire context and core.
- Requesting screen capture permission via xdg-desktop-portal, which
triggers a user consent dialog.
- Receiving the PipeWire node ID for the selected screen/window.
- Connecting a PipeWire stream to the capture node.
- Processing a single video frame from the PipeWire stream.
- Converting the raw frame data into a QImage and saving it as a PNG file.
This POC serves as a foundational step towards adapting the Hyperion
grabber to work natively on Wayland, replacing the existing X11-specific
grabbing logic.
Further work will involve integrating this logic into the main grabber
application and handling continuous frame processing.
