[HachemJ]

Brief summary of changes

This PR introduces a Configuration interface for managing candidate identifier types, building on the database structure and backend functionality introduced in the preceding PRs #11209, #11212 and #11253.

Candidate identifier types define how identifiers such as PSCIDs or external IDs are configured and associated with projects. The new interface allows administrators to create and edit these types through the Configuration module, including their name, format, required and uniqueness settings, automatic generation, support for multiple values, and associated projects.

Existing identifier types are displayed in separate tabs alongside an option to create a new type. The interface follows the conventions of the existing LORIS Configuration pages, with field descriptions, save and reset functionality, and validation for required fields and duplicate names.

Testing instructions (if applicable)

1. Run make testdata to initialize the database, or apply the 2026-09-22-add_candidate_identifiers_tables.sql database patch to an existing database.

2. Log in with a user who has the config permission.

3. Navigate to Admin --> Configuration --> Candidate Identifier Types.

4. Verify that existing identifier types, such as PSCID, appear in separate tabs with their configured properties and project associations.

5. Select New Identifier Type, enter a name and format, configure the checkboxes and associated projects, and click Save.

6. Verify that a success message appears and the new identifier type is displayed after reloading.

7. Edit an existing identifier type, save the changes, and verify that the updated values persist after reloading.

8. Attempt to create an identifier type with an existing name and verify that a validation error appears without saving any changes.

9. Attempt to save an identifier type with an empty name or format and verify that validation prevents saving.

10. Verify that field tooltips display correctly and that Reset restores unsaved changes.