[FE] Improving the add new evaluation modal

[mmabrouk]

The current "Add New Evaluation" view has limitations. Firstly, it does not work effectively when there are a large number of evaluations. Secondly, it lacks a description for the evaluations. Lastly, it does not provide sufficient configuration options or explanations for the evaluators.

To address these limitations, we propose improving the modal. The enhanced modal will display a scrollable list of evaluators with three columns: Name, Type, and Short Description (refer to the screenshots in the Google Doc). When an evaluator is selected, a new modal will appear, showing the description of the evaluator and allowing for configuration. The new modal should include a back button for navigation, as well as options to cancel or save the changes. Additionally, editing an evaluator in the available list should directly open the second modal.