feat: allow for select groups in config

[JarrodMFlesch]

Description

This PR extends the functionality of the select field, allowing you to group items together. You can also mix and match option types now.

    {
      name: 'presidents',
      type: 'select',
      options: [
        {
          label: '1700s',
          options: [
            {
              label: 'George Washington',
              value: '1',
            },
            {
              label: 'John Adams',
              value: '2',
            },
          ],
        },
        {
          label: '1800s',
          options: [
            {
              label: 'Thomas Jefferson',
              value: '3',
            },
            {
              label: 'James Madison',
              value: '4',
            },
          ],
        },
      ],
    },

• [ ] I have read and understand the CONTRIBUTING.md document in this repository.

Type of change

• [x] New feature (non-breaking change which adds functionality)

Checklist:

• [ ] I have added tests that prove my fix is effective or that my feature works
• [ ] Existing test suite passes locally with my changes
• [ ] I have made corresponding changes to the documentation