add pipewire network config

- zeroconf discover and publish
- offer sink

.config/pipewire/pipewire.conf.d/60-network.conf

@@ -0,0 +1,23 @@
+# NOTE: if discovery does not work, use:
+#       pactl load-module module-tunnel-sink server=HOSTNAME
+
+# context.exec = [
+#     { path = "pactl" args = "load-module module-zeroconf-discover" }
+#     { path = "pactl" args = "load-module module-native-protocol-tcp" }
+#     { path = "pactl" args = "load-module module-zeroconf-publish" }
+# ]
+
+context.modules = [
+    { name = libpipewire-module-protocol-pulse ars = {} },
+    { name = libpipewire-module-zeroconf-discover args = {} },
+    # { name = libpipewire-module-zeroconf-publish args = {} }, # >= 1.0.7
+]
+
+pulse.properties {
+    server.address = [ "unix:native" "tcp:4713" ]
+}
+
+# TODO: when pipewire 1.0.7, use module above instead
+context.exec = [
+    { path = "pactl" args = "load-module module-zeroconf-publish" },
+]