Add ns.printf function

Behaviour is consistent with that of tprintf versus tprint and
should be equivalent to ns.print(ns.sprintf(...))

src/Netscript/RamCostGenerator.ts

@@ -114,6 +114,7 @@ export const RamCosts: IMap<any> = {
   weaken: RamCostConstants.ScriptWeakenRamCost,
   weakenAnalyze: RamCostConstants.ScriptWeakenAnalyzeRamCost,
   print: 0,
+  printf: 0,
   tprint: 0,
   clearLog: 0,
   disableLog: 0,

src/NetscriptFunctions.ts

@@ -722,6 +722,12 @@ export function NetscriptFunctions(workerScript: WorkerScript): NS {
       }
       workerScript.print(argsToString(args));
     },
+    printf: function (format: string, ...args: any[]): void {
+      if (typeof format !== "string") {
+        throw makeRuntimeErrorMsg("printf", "First argument must be string for the format.");
+      }
+      workerScript.print(vsprintf(format, args));
+    },
     tprint: function (...args: any[]): void {
       if (args.length === 0) {
         throw makeRuntimeErrorMsg("tprint", "Takes at least 1 argument.");

src/ScriptEditor/NetscriptDefinitions.d.ts

@@ -4460,6 +4460,17 @@ export interface NS extends Singularity {
    */
   print(...args: any[]): void;
 
+  /**
+   * Prints a formatted string to the script’s logs.
+   * @remarks
+   * RAM cost: 0 GB
+   *
+   * see: https://github.com/alexei/sprintf.js
+   * @param format - format of the message
+   * @param args - Value(s) to be printed.
+   */
+  printf(format: string, ...args: any[]): void;
+
   /**
    * Prints one or more values or variables to the Terminal.
    * @remarks