Make the GameSDK return all the user's activities instead of a single one

[EliasVal]

Currently (v3.2.1) the GSDK returns only one of the activities instead of an array when accessing Discord.Relationship.Presence.Activity.
If the user has a custom status, it will always show the custom status, so I can't check if a user is playing my game or not.

My idea is basically to either

• return an array of activities (for example: listening, playing and custom status all at once if the user has all of those)
  or
• return a dictionary where the keys are the type of activity/applicationId and the value is the rest of the data about the activity.