[FEATURE] improve field attribute selection with autocomplete attribute support

[pascalmoser]

The current version lacks a convenient way to set the autocomplete attribute for form fields. This attribute is essential for enhancing the user experience, especially for accessibility.

To-Do:

• Improve attribute selection: Currently, attributes always have a single type, "Default," in the dropdown. This click is unnecessary.
• Add "Autocomplete" to the option list.
• The value of this new entry should be an array with predefined autocomplete values (https://www.w3.org/TR/WCAG21/#input-purposes).

Example Screenshot: