[Server] Rename property cell into description, initialize Cells type

apps/openmw-mp/Cells.cpp

@@ -14,7 +14,7 @@ using namespace std;
 void Cells::Init(LuaState &lua)
 {
     lua.getState()->new_usertype<Cells>("Cell",
-                                        "cell", sol::property(&Cells::getCell, &Cells::setCell),
+                                        "description", sol::property(&Cells::getCell, &Cells::setCell),
                                         "getExterior", &Cells::getExterior,
                                         "setExterior", &Cells::setExterior,
                                         "getRegion", &Cells::getRegion,

apps/openmw-mp/Script/LuaState.cpp

@@ -72,6 +72,7 @@ LuaState::LuaState()
 
     cmdCtrl = make_unique<CommandController>();
     Player::Init(*this);
+    Cells::Init(*this);
     CharClass::Init(*this);
     Inventory::Init(*this);
     GameSettings::Init(*this);