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.

尚未确定任何源文件、测试或入口点。首先应明确 JWT 身份验证和 SQLite 支持是否都在范围内；要完成工作，需要为每项提议的功能制定明确的需求并进行验证。

由索引模型根据 Issue 内容生成。