Better encryption and easier database test

### The required feature described as a wish

As a user I would like to have better encryption and, above all, to be able to perform quick tests without the complexity of setting up traditional databases, so I think it would be a good idea to implement JWT and SQLite in Cloudstack.

JWT could be implemented to improve the way in which users like me or applications access the API, as it uses user/password credentials, as well as a token that expires according to a stipulated time. JWT would be very easy to implement in Cloudstack.

SQLite does not require a dedicated server, which would make Cloudstack less resource-intensive and easier to configure, as well as allowing for rapid prototyping and testing.

No source files, tests, or entry points are identified. Begin by clarifying whether JWT authentication and SQLite support are both in scope; completion would require explicit requirements and validation for each proposed feature.

Written by the indexing model from the issue text.