[FEATURE] make user profiles bookmarkable

[Veraellyunjie]

For when you hesitate whether to like someone or cross them and you want to revisit the person's page later

[Veraellyunjie]

Bookmarking vs following.

Following would notify follower on updates in followee's profile.
Followee should see they have followers.

Bookmarking does neither, but you still can visit person's profile.

Users of Alovoa might benefit from one of the features or even both...