[TASK] Implement ValuePicker as custom web component

TCA's value picker uses a lot inline JavaScript for its
picker handling, therefore, the handling has been moved
into a dedicated web component.

As a side-effect a bug in TextElement and InputTextElement
is fixed. Both elements previously used exactly the opposite
insert mode.

Resolves: #94112
Releases: master
Change-Id: Ib3a1f9697477cab4b9a00c606fcd0bd6524450b5
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/69108


Tested-by: Benjamin Franzke <bfr@qbus.de>
Tested-by: core-ci <typo3@b13.com>
Tested-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Reviewed-by: Benjamin Franzke <bfr@qbus.de>
Reviewed-by: Andreas Fernandez <a.fernandez@scripting-base.de>