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/idevicedate.md

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+# idevicedate
+
+> Display the current date or set it on an iOS device.
+> More information: <https://manned.org/idevicedate>.
+
+- Display the current date and time:
+
+`idevicedate`
+
+- Set the date and time on the device to the system time:
+
+`idevicedate --sync`
+
+- Set the date and time to a specific timestamp:
+
+`idevicedate --set {{timestamp}}`