Moved utility modules into their own folder

Dependencies

• [2] ZGMIJNFV Create pijul.ts for executing commands using the Pijul CLI
• [3] 6WGBCLHN Add event and disposable utility modules
• [4] NCBEWRYE Initialize Repository
• [5] LPHT6WEL Fix unused variable warning

Change contents

• replacement in src/pijul.ts at line 5
  [2.173]→[2.173:287](∅→∅)
  − import { dispose, IDisposable, toDisposable } from './disposableUtils';

  − import { onceEvent } from './eventUtils';
  [2.173]

  [2.287]
  + import { dispose, IDisposable, toDisposable } from './utils/disposableUtils';

  + import { onceEvent } from './utils/eventUtils';
• file addition: utils (dxwrx-rx-r)
  [4.104980]
• file move: eventUtils.ts (-xw-x--x--) → eventUtils.ts (-xw-x--x--)
  [0.135]

  [3.16]
• file move: disposableUtils.ts (-xw-x--x--) → disposableUtils.ts (-xw-x--x--)
  [0.135]

  [3.1947]