Feature: #110331 - Improved form template picker with icon and description 

See forge#110331

Description 

The "Create new form" wizard in the EXT:form backend module has been improved. The previous two-step flow — first choosing between Blank and Predefined mode, then selecting a template from a dropdown — has been replaced by a single, unified template picker.

All available form templates are now presented as a card-based grid using the <typo3-backend-new-record-wizard> component. Each card displays the template's label, an icon, and an optional short description. Selecting a card immediately advances the wizard to the next step.

To support the new UI, two optional keys have been added to the newFormTemplates.* configuration:

iconIdentifier
A TYPO3 icon identifier shown on the template card. Falls back to form-page when omitted.
description
A short description text displayed below the template label on the card. Supports translation keys resolved against the configured translationFiles.

Example configuration in EXT:my_extension/Configuration/Form/formManager.yaml:

formManager:
  selectablePrototypesConfiguration:
    100:
      identifier: standard
      label: formManager.selectablePrototypesConfiguration.standard.label
      newFormTemplates:
        100:
          templatePath: 'EXT:form/Resources/Private/Backend/Templates/FormEditor/Yaml/NewForms/BlankForm.yaml'
          label: formManager.selectablePrototypesConfiguration.standard.newFormTemplates.blankForm.label
          description: formManager.selectablePrototypesConfiguration.standard.newFormTemplates.blankForm.description
          iconIdentifier: 'apps-pagetree-page-default'
        200:
          templatePath: 'EXT:form/Resources/Private/Backend/Templates/FormEditor/Yaml/NewForms/SimpleContactForm.yaml'
          label: formManager.selectablePrototypesConfiguration.standard.newFormTemplates.simpleContactForm.label
          description: formManager.selectablePrototypesConfiguration.standard.newFormTemplates.simpleContactForm.description
          iconIdentifier: 'form-page'
Copied!

Impact 

Integrators can enrich form template entries with an iconIdentifier and a description to improve the editor experience in the "Create new form" wizard. Both keys are optional; existing configurations continue to work without changes.