[TASK] Streamline Web->Template module UI

This change reduces technical debt on the HTML/CSS side
by utilizing Fluid templates and Bootstrap 5 utilities in favor
of home-grown code for Web->Template module.

Most important changes:
* Move as much logic from Controller in the Views (removal of LLprefix)
* Unify module settings to be on top of the module and not below a listing
* Streamline checkboxes
* Remove inline CSS code

Resolves: #93523
Releases: master
Change-Id: I3ed23b57b4e2ff7d9efef9977801aecf2c9f02fb
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/67953


Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: core-ci <typo3@b13.com>
Tested-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Tested-by: Oliver Bartsch <bo@cedev.de>
Tested-by: Richard Haeser <richard@richardhaeser.com>
Reviewed-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Reviewed-by: Oliver Bartsch <bo@cedev.de>
Reviewed-by: Richard Haeser <richard@richardhaeser.com>