[Discuss][Doc] Migrate cdc doc to flink.

[GOODBOY008]

Search before asking

• [X] I searched in the issues and found nothing similar.

Motivation

Give some suggestions for new cdc doc website. demo website：http://203.24.92.93:1313/

Solution

No response

Alternatives

No response

Anything else?

No response

Are you willing to submit a PR?

• [X] I'm willing to submit a PR!