Replace pyfakewebcam with threading

[hoangtrann]

There is a known issue with pyvirtualcam with how it closes the webcam. The video output capability is somehow removed. I usually need to remove the modprobe and re-create it. If not doing sow, it will raise an error saying that the device is not an output one.

sudo modprobe -r v4l2loopback
sudo modprobe v4l2loopback devices=1 video_nr=10 max_buffers=2 exclusive_caps=1 card_label="Virtual Webcam"

fixes #219

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

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[fangfufu]

Thanks!