Refactor: people_search

[lcanobbio]

Description
The aim of this ticket is to refactor the people_search class and perhaps move it to a separate class. You can take inspiration from this refactoring #1098

Additional context

• inspiration PR: feat: implement logic to support the new or logic per added skill to search #1013 #1098
• inspiration Ticket: Skill-Search: OR-Search instead of only AND-Search #1013

If @Kagemaru has time it would make sense to do a pair programming with @Kagemaru

TODO

• Refactor people_search
• Tests
• Update CHANGELOG.md if feature is major
• Update Readme.md if necessary