[FEATURE] Add country select form element to form framework

With the introduction of the new country API and
the correspodning Fluid form viewhelper in #99618,
is the form framework extendend for a new form
element "country select".

The form element allows several configuration
options and renderes a single select element
in the frontend, using the corresponding form
viewhelper.

Following configuration options are available:

- First option: Defines the "empty option", i.e.
  the first element of the select.
- Prioritized countries: Defines a list of countries,
  which should be listed on top.
- Only countries: Defines the countries to be shown
  in the select list.
- Exclude countries: Defines the countries not to
  be shown in the list.

Resolves: #99735
Releases: main
Change-Id: I27f135bb38ba727d25fb6bdc684555972f1e8f1b
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/77623


Tested-by: Benni Mack <benni@typo3.org>
Tested-by: Oliver Bartsch <bo@cedev.de>
Reviewed-by: Benni Mack <benni@typo3.org>
Tested-by: core-ci <typo3@b13.com>
Reviewed-by: Oliver Bartsch <bo@cedev.de>