User can generate a Fermi estimator

[git-union-dev[bot]]

Description

As a user, I want to be able to generate a Fermi estimator based on the provided categories and prompts.

Acceptance criteria

• [ ] User can select the number of estimators to be generated
• [ ] User can generate estimators based on the selected categories and prompts
• [ ] Generated estimators should follow the Fermi estimation technique