Indicate free text taxonomies in the taxonomy list

From the studio home page, click "Taxonomies". Then, the list of taxonomies should display a badge on any taxonomies that are free text taxonomies:

<img width="892" height="337" alt="Image" src="https://github.com/user-attachments/assets/a7e8e424-e422-4df2-8ad7-7de9850953a4" />