Add people in searchDiscover response

[BenjaminOddou]

Description

The goal is to add people object in the searchDiscover() response.

Fixes #1158

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have added or updated the docstring for new or existing methods
• I have added tests when applicable

[BenjaminOddou]

@JonnyWong16 do you know if it would be possible to parse people object (from discover) to an existing plex class ? Or should it be a new one ? Many thanks in advance !