Install new dependencies before program start

[AndreWohnsland]

Currently, the migrator has the job of installing new dependencies.
While this is quite a convenient way to do this, there are also some issues.
One is that you cannot have new dependencies (libraries) in any migrator dependent code, which once happened with the database controller, resulting in a program crash.
It would be beneficial to manage the dependencies outside the main program, that it is guaranteed dependencies are all installed.

AC

• New dependencies are installed before the program is started
• Concept draft and in place how this could look like

[AndreWohnsland]

See also #242 (comment), we will go with uv for v2, but remain the same like in v1.