Visibility of certificates/templates

[paramsiddharth]

The editing permissions will obviously remain with the creator (owner) themselves, but the visibility of certificates may be controlled:

• Public certificates/templates will remain as they currently are.
• Password-protected certificates/templates will only be accessible after authentication using a certificate-specific password. The password must be sent via a query parameter for all authenticated operations.

More customization of visibility will be feasible once authentication is implemented in Rema.