- Creates a new StackTemplateRegistry that uses the new names
- The new registry only respects stack.templates.enabled for index templates
- Renames the old registry to LegacyStackTemplateRegistry
- Component templates are not duplicated but registered under two different names
- Documents the new naming convention
- Index templates are not renamed, at least for now, as there are some challenges with it
See 7fd0423 for more details.