feat(sdk): client, annotations

[doronkopit5]

• Remove reportScore
• Introduce TraceloopClient
• Add userFeedback functionality

[galkleinman]

Looks really clean!

Couple of points to think of:

• Not sure the package/class I would expect as a user of us is Annotation I mean, I think we should have Annotation as a base class (which actually handles all the logics), and a wrapper which is doing almost nothing except calling the base class with a "user-feedback" flow argument called UserFeeback.
• EntityInstanceId - I know what the Instance stands for, but maybe we should call it only in the client EntityId? maybe it should be an object in general? Entity { id: , type?: } - think of a robust api since it'll be hard to break it once users will use it...
• Add some tests :)

[galkleinman]

looks great.