Previously opening the documentation did not provide an introduction to the general library.
This PR adds introductiory texts to the start of the documentation and each of the three modules integer, integer_mod_q, rational.
Checklist:
[x] I have performed a self-review of my own code
[x] The code provides good readability and maintainability s.t. it fulfills best practices like talking code, modularity, ...
Description
Previously opening the documentation did not provide an introduction to the general library. This PR adds introductiory texts to the start of the documentation and each of the three modules
integer,integer_mod_q,rational.Checklist: