Copy existing issues to the target project.
The plug-in operation steps are as follows：
Install and start the application;
In the "Create Custom Field" section of the custom field menu, add a new field type named "Casecade Custom Field Type".
After selecting this type to create a field, create a three-level cascading field that can edit the field context.
The context configuration can be added, edited, or deleted, and the "Add first level option" button can add a first level option, but due to system limitations, editing the default value is currently not supported.
This field can be configured to display on the issue screen or edited on the screen.
