hacker.js: remove unecessary `string_server_used` parameter for `exec` used in `void_schedule_runner`.

Dependencies

• [2] MKHG4OQB make worker scripts and worker script executor time-aware.
• [3] AXGQ7FML split and refactor hacking logic to "hacker.js" and argument parsing and script execution logic to "main.js". update "README.md".
• [4] 2BKHJI2S init

Change contents

• replacement in sbin/weaken.js at line 2
  [3.46]→[2.4:76](∅→∅)
  − await ns.sleep(Date.now() + ns.args[2]), await ns.weaken(ns.args[1]);
  [3.46]

  [3.1997]
  + await ns.sleep(Date.now() + ns.args[1]), await ns.weaken(ns.args[0]);
• replacement in sbin/hack.js at line 2
  [3.156]→[2.85:155](∅→∅)
  − await ns.sleep(Date.now() + ns.args[2]), await ns.hack(ns.args[1]);
  [3.156]

  [3.52923]
  + await ns.sleep(Date.now() + ns.args[1]), await ns.hack(ns.args[0]);
• replacement in sbin/grow.js at line 2
  [3.257]→[2.157:227](∅→∅)
  − await ns.sleep(Date.now() + ns.args[2]), await ns.grow(ns.args[1]);
  [3.257]

  [3.53351]
  + await ns.sleep(Date.now() + ns.args[1]), await ns.grow(ns.args[0]);