feat: jsdocs for generated types, by using admin.description (#9917)

This makes use of admin.description to generate JSDocs for field,
collection and global generated types.


![image](https://github.com/user-attachments/assets/980d825f-49a2-426d-933a-2ff3d205ea24)


![image](https://github.com/user-attachments/assets/d0b1f288-1ea1-4d80-8c05-003d59a4e41a)

For the future, we should add a dedicated property to override these
JSDocs.

You can view the effect of this PR on our test suite generated types
here:
05f552bbbc

test/localization-rtl/payload-types.ts

@@ -75,6 +75,8 @@ export interface User {
   password?: string | null;
 }
 /**
+ * Description
+ *
  * This interface was referenced by `Config`'s JSON-Schema
  * via the `definition` "posts".
  */