Tracking issue presence

[farodin91]

State:

• Add Endpoints
• Fix migrations of table filters
• Add only existing users (presence_list)
• Support presence in sync with since
• Support sync set_presence
• Change some sync response types to event_type collections
• Add config for custom presence timeout
• Clean up RoomMembership by moving a user existence test to User
• Update Status.md
• Update ruma-events to 0.3.0
• Add check before getting status endpoint. (Alice and Bob must be in a same Room.)
• Add check before updating list endpoint. (Alice and Bob must be in a same Room.)
• Sending a m.presence event again after changing avatar_url or displayname

ToDo

• Update last_active_ago and currently_active to work as the spec says.
• Create a server behavior to update presence state if they are too old.
• Support limit in sync presence

[jimmycuadra]

Don't update ruma-events/ruma-identifers yet. The latest diesel doesn't work with the way it's currently implemented. diesel-rs/diesel#562 (comment)

[jimmycuadra]

Now tracking that problem in its own issue: diesel-rs/diesel#640