Changes

docs: add topic about remote UICC/eUICC access

With osmo-remsim and Android APDU proxy we have two powerful solutions to
allow remote acces to UICC/eUICC cards. Let's add a section where we give
a brief overview about those solutions, so that pySim-shell users get
awre of them.

Related: OS#6367
Change-Id: I73de4de2e5d4a01d6d91989ee684cbdb680de8ef