added script to setup obs pulse loopback source

obs_video_sink_load.conf

@@ -0,0 +1 @@
+v4l2loopback

obs_video_sink_options.conf

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+
+options v4l2loopback video_nr=9 card_label="OBS Video Source" exclusive_caps=1

obssink.sh

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+#!/usr/bin/env sh
+
+pactl load-module module-null-sink sink_name=OBSSink
+pacmd update-sink-proplist OBSSink device.description=OBSSink
+pactl load-module module-virtual-source source_name=OBSSource master=OBSSink.monitor
+pacmd update-source-proplist OBSSource device.description=OBSSource