Refactor the code in cli/starters.py

[lrcouto]

Description

The cli/starters.py file contains code that handles things like the project creation flow, starter selection and tool selection. Over time, this file became quite large, now having close to a thousand lines. This causes the file to be hard to work with, and also hard to review, as the logic in the code becomes more difficult to follow.

Possible Implementation

Things that could possibly help on this matter:

• Extracting the functions related to the tools feature to their own file.
• Extracting utility functions, like validation and conversion functions, to another file.
• Going over logic that might be redundant and simplifying it.