idevice*, iproxy: add pages (#14363)

Co-authored-by: Juri Dispan <juri.dispan@posteo.net>
Co-authored-by: Wiktor Perskawiec <git@spageektti.cc>
Co-authored-by: Sebastiaan Speck <12570668+sebastiaanspeck@users.noreply.github.com>

pages/common/idevicesyslog.md

@@ -0,0 +1,12 @@
+# idevicesyslog
+
+> Relay syslog messages from a connected iOS device.
+> More information: <https://manned.org/idevicesyslog>.
+
+- Relay syslog messages from the connected device:
+
+`idevicesyslog`
+
+- Suppress kernel messages and print everything else:
+
+`idevicesyslog --no-kernel`