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/idevicepair.md

@@ -0,0 +1,12 @@
+# idevicepair
+
+> Manage host pairings with iOS devices.
+> More information: <https://manned.org/idevicepair>.
+
+- Pair a device with the host:
+
+`idevicepair pair`
+
+- List devices paired with the host:
+
+`idevicepair list`