Feature/pt 2776 create entries toolbar configurator

[i-just]

Description

This PR:

• moves the selection of entry types from field settings to CKE config settings
• adds the ability to choose which entry type should show as a standalone button and which in a dropdown
• gives the ability to choose if entry type should show as icon/text/icon+text (if the entry type has an icon specified)
• each standalone entry type button and the dropdown button are now separate and move to the overflow dropdown one by one

A migration moves the entry types from the field to the CKE config. If multiple fields use the same config but different entry types (completely different, same but in different order, same but with overwritten names or handles), the CKE config will be duplicated, and the entry types from the field will be used.

If the field has expandEntryButtons set to true, all the entry types with icons will be set to show as separate buttons during migration.

@gcamacho079 and I are discussing colours and accessibility. Once we’re in agreement, the way we handle colours for entry types might change. update: colours now account for the minimum contrast requirements.

Added:

• craft\ckeditor\CkeConfig::getEntryTypes()
• craft\ckeditor\CkeConfig::setEntryTypes()
• craft\ckeditor\CkeConfig::getEntryTypeOptions()
• craft\ckeditor\models\EntryType
• craft\ckeditor\controllers\CkeConfigsController::actionApplyEntryTypeIndicators()
• craft\ckeditor\helpers/CkeditorConfig::getCkeEntryType()

Removed:

• craft\ckeditor\Field::$createButtonLabel
• craft\ckeditor\Field::$expandEntryButtons
• craft\ckeditor\Field::getEntryTypes()
• craft\ckeditor\Field::setEntryTypes()

Changed:

• craft\ckeditor\CkeConfigs::getByUid() now has a second, optional parameter

Related issues

cms-2776

Requires craftcms/cms#17387 to be merged into cms v5.

[linear]

PT-2776 Create entries toolbar configurator