enhancement(Utils) implemented confirmation container util methods

[gselderslaghs]

Proposed changes

This is a proof-of-concept for #570
Implemented confirmation container util with callback functions so it's reusable among other components

Example of creating a single button with callback method:

Utils.createButton(
  '.container', // container to append to
  'Label', // button label 
  ['teal', 'btn-large'], // additional classes
  true, // visibility
  callback // callback method
);

Example of creating a confirmation container:

Utils.createConfirmationContainer(
  '.container', // container to append to
  'Confirm', // button label
  'Cancel', // button label
  confirm, // confirm callback
  cancel // cancel callback
);

Types of changes

• Bug fix (non-breaking change which fixes an issue).
• New feature (non-breaking change which adds functionality).
• Breaking change (fix or feature that would cause existing functionality to change).

Checklist:

• I have read the CONTRIBUTING document.
• My commit messages follows the conventional commit format
• My change requires a change to the documentation, and updated it accordingly.
• I have added tests to cover my changes.
• All new and existing tests passed.

[wuda-io]

Awesome. LGTM.