fix(people): correct friends list API endpoint for target users

[misiektoja]

The get_friends_by_xuid method was incorrectly routing to /users/me/people/xuids({xuid})/ which only checks the relationship between the authenticated user and the target, returning empty data (0 friends) if they aren't mutual friends.
This fixes the URL path to /users/xuid({xuid})/people/friends/ as in Xbox Android app, correctly utilizing Xbox Live Contract v7 to fetch a target user's friends list.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 88.31%. Comparing base (195fdcd) to head (ec89628).
⚠️ Report is 5 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #103      +/-   ##
==========================================
- Coverage   88.34%   88.31%   -0.03%     
==========================================
  Files          54       54              
  Lines        2857     2868      +11     
==========================================
+ Hits         2524     2533       +9     
- Misses        333      335       +2     

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[tr4nt0r]

Generally looks good to me, just the docstring should be updated. And the endpoint we are replacing is still needed, I think it is the only way to retrieve the own profile, or a single profile for the specified xuid. Would you like to add a new method, e.g. get_profile_by_xuid in a follow-up PR?

[misiektoja]

Thanks, I've updated the docstring for get_friends_by_xuid.

Regarding the follow-up PR, I can implement that, but should I wait for the current fix to be merged into main before opening the follow-up or would you prefer me to open it against this branch now?

[tr4nt0r]

Let me merge this first. Thanks for your help 👍🏼