Added ns function stanek.acceptGift

Added a new ns function stanek.acceptGift to the game, with a ram
cost of 2gb. The function attempts to join the CotMG and install
the gift, then returns true iff the player is in the CotMG and has
the gift installed.

src/Netscript/RamCostGenerator.ts

@@ -70,6 +70,7 @@ export const RamCostConstants: IMap<number> = {
   ScriptStanekPlace: 5,
   ScriptStanekFragmentAt: 2,
   ScriptStanekDeleteAt: 0.15,
+  ScriptStanekAcceptGift: 2,
 };
 
 function SF4Cost(cost: number): (player: IPlayer) => number {
@@ -284,6 +285,7 @@ const stanek: IMap<any> = {
   placeFragment: RamCostConstants.ScriptStanekPlace,
   getFragment: RamCostConstants.ScriptStanekFragmentAt,
   removeFragment: RamCostConstants.ScriptStanekDeleteAt,
+  acceptGift: RamCostConstants.ScriptStanekAcceptGift,
 };
 
 // UI API