Make the Coverage API more understandable and easier to use

[z25clave]

What it's the actual situation on ARA ? I wanted to use the api /functionalities/coverage to retrieve information about the coverage in my team. The response is not user-friendly and it's hard to know how datas are used to build the hmi

Describe the solution you'd like A response more friendly. something like (it's just an example) {"teams": "15, "severity" : "High", "coverage" : { "Covered" : 3, "Ignored" : 4, ......}, {"teams": "15, "severity" : "Medium", "coverage" : { "Covered" : 3, "Ignored" : 4, ......}, ....

Describe alternatives you've considered NA

Additional context NA