Add ns.printf function

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

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