Person endpoints: filterBy for all people

These are about filtering on all the people from database based on their username/displayName/number/cohort.

I have noticed that in Person model, there is no link to cohort. Is this something that we want to be implemented or we need to figure out a different way how to filter on cohort for everyone? If it's too complicated, I think we can do with the first 3 for now.

Endpoint (Method): filterByUsername

Params	Type	Comment
Input	String	username
Output	List<PersonViewDTO>	people

What does this method do?

1. For this, I would use the findByUsernameLike query.

Endpoint (Method): filterByDisplayName

Params	Type	Comment
Input	String	displayName
Output	List<PersonViewDTO>	people

What does this method do?

1. For this, I would use the findByDisplayNameLike query.

Endpoint (Method): filterByNumber

Params	Type	Comment
Input	Integer	number
Output	List<PersonViewDTO>	people

What does this method do?

1. For this, I would use the findByNumberLike query.

Endpoint (Method): filterByCohort

Params	Type	Comment
Input	Long	cohortId
Output	List<PersonViewDTO>	people

What does this method do?

1. I'm not really sure how to go about this if Person doesn't have a cohort linked to them. As I was saying above, maybe we can just do the first 3 endpoints for now and leave this for later.