Request: Documentation of Karmada components

[RainbowMango]

What documentation would you like to be added:

I'd like to have a document to explain how many components in Karmada and what each component does.
Just like the document of Kubernetes Components.

Why do you think this document is needed:

An overview document about the components would help people understand the architecture of Karmada quickly.

Where do you think the new document should be placed:

I think the document could be placed under /Documentation/Core Concepts/Components.
More precisely, the document should be placed in this code directory:
https://github.com/karmada-io/website/tree/main/docs/core-concepts/components.md

[chaosi-zju]

you can preview the document at here: karmada components

can you help me to confirm if there are any major issues in the document ? I will continue to improve on this basis.

[RainbowMango]

/assign @chaosi-zju
in favor of #420