Update profiles with default values

[ozankrkya]

🧱 Description

Update profile objects with default values when creation. Return followers, followings, posts and their counts in profile endpoint.

review: @MucahitErdoganUnlu

📋 Acceptance Criteria

• [x] Defaults are given.
• [x] Profile endpoint works just as fine.

[ozankrkya]

• Default biography asks for update the biography from user.
• Default profile picture is the logo of the Zenith app.