Create documentation for the cores component.

[kdruckman]

Adding documentation to the root GenAIComps/comps/cores folder would help visitors to the repository understand the function of the folder's contents.

[kevinintel]

will add it

[chickenrae]

@kevinintel I'm adding up Hackathon numbers, is this complete?

[yinghu5]

Remind：doc team will take care of this.