Problem/Motivation

There's a failing Assertion in Drupals FieldTypePluginManager class. Depending on how your debugging is configured this could lead to a fatal error "AssertionError: "AZ Quickstart" must be defined in MODULE_NAME.field_type_categories.yml in assert() (line 195 of core/lib/Drupal/Core/Field/FieldTypePluginManager.php).".

To Reproduce

Steps to reproduce the behavior:

1. Set assert_options(ASSERT_ACTIVE, TRUE); in Drupal settings or set the PHP config assert.active to on.
2. Try adding a new field to any of the content types.
3. You should receive the error " "AZ Quickstart" must be defined in MODULE_NAME.field_type_categories.yml in assert() " with a stack trace.

Proposed resolution

Looks like we need a az_quickstart.field_type_categories.yml file to define the category specified in FieldType definitions in AZ Quickstart. Currently the definitions for AZCardItem and AZAccordionItem set the category to category: new TranslatableMarkup("AZ Quickstart"), but "field type category as a translatable label in annotation is deprecated" (reference).

Expected behavior

Adding a new field to Content Types should not result in an Assertion Error.