Add Authentication and Authorisation checks to routes

[j-toscani]

Description (five sentences max.) I do not want everybody to be able to do everything. In order to protect routes, data, and users I need to implement route middleware for authorisation and authentication checks.

Possible implementation Optional and mostly for discussion.

Acceptance Criteria

• Lifecycle hooks in Elysia
• Route Middleware in Next. One to check authentication and one to route api request to not have to use CORS.

Out of Scope

• Authentication strategies.
• Authentication/Authorisation flow
• Token/User persistence

Document optional improvements Optional. Could lead to a better feature.

[j-toscani]

I want to implement WebAuthN. As this is totally different from JWTs - which I am used to using, I will also add an example implementation of WebAuthN. Hence, this Issue will Blow up and it will be structured into the following tasks:

• [ ] Add necessary frontend and backend Libraries
• [ ] Add/Update DB collections (User & UserSignatures)
• [ ] Add Server middleware to protect routes
• [ ] Add Next middleware to know wheter or not I am logged in