Add types of calls for paratrooper squad messengers

[青州牧]

As the title suggests, in the current version, after paratroopers land, the chosen signalman cannot call for ammo resupply or smoke grenades. I hope that in the next update, the signalmen in the paratrooper squad can call for ammo resupply and smoke grenades just like those in the signalman squad.

[MR_87]

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