Update Xef Server database to allow Authentication

[José Carlos Montañez]

The objective of this issue is to add a migration to the xef-db-postgres.

This is the general structure:

flowchart TD
    A[Users]
    B[Projects]
    C[Organisation] 
    D[Tokens]
    A -->|n - n| C
    B -->|1 - n| C
    D -->|1 - n| A
    D -->|1 - 1| B

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The user will have an email and password as the current way to log in. At this point, when the server starts, it should have a default User, organisation and project.