Draft: Add new work item type create edit form

What does this MR do and why?

Add new work item type create edit form

References

Screenshots or screen recordings

Screen Recording 2025-12-18 at 3.34.35 PM.mov

How to set up and validate locally

1. Enable work_item_configurable_types FF
2. Go to group settings page
3. Click on "New type" in the work item type settings section
4. See the form

MR acceptance checklist

Evaluate this MR against the MR acceptance checklist. It helps you analyze changes to reduce risks in quality, performance, reliability, security, and maintainability.

Related to #580932