[feature request] Examples folder

[mevgdev]

What would you like to be added: Add examples for all case to deploy openyurt, for examples:

• add node
• simple deploy
• create nodepool
• deploy on nodepool
• deploy with helm
• leader node and deploy
• coordinator case
• other case....

Why is this needed: I think is import to see how to use OpenYurt from autors, that is to say, yours, for new developers understand the real spirit from OpenYurt, we need to see, we need to replay that examples in ours local machine.

A big hugs for your! from Chile

others /kind feature