pw-link: add page (#7703)

pages/linux/pw-link.md

@@ -0,0 +1,20 @@
+# pw-link
+
+> Manage links between ports in PipeWire.
+> More information: <https://gitlab.freedesktop.org/pipewire/pipewire/-/wikis/Virtual-Devices>.
+
+- List all audio output and input ports:
+
+`pw-link --output --input'`
+
+- Create a link between an output and an input port:
+
+`pw-link {{output_port_name}} {{input_port_name}}`
+
+- Disconnect two ports:
+
+`pw-link --disconnect {{output_port_name}} {{input_port_name}}`
+
+- Display help:
+
+`pw-link -h`