Update requirements

[JanSkn]

Is your feature request related to a problem? Please describe.
Add specific versions to the requirements under docs/requirements.txt, e.g. numpy>=1.26.
Also, distinguish between user and dev libraries.

! Check first if the versions are compatible !

Describe the solution you'd like
Every library should have a specific version and user and dev should be separate.

Describe alternatives you've considered
/

Additional context
Requirements get imported in setup.py

[Nikhil190804]

what exact versions of library do you want to add ?

[JanSkn]

@Nikhil190804 hey, it would be nice to have the earliest versions that the code works on, but it could be current versions if there are no deprecations