Introduce how to release and how to verify release doc

[luoyuxia]

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• I searched in the issues and found nothing similar.

Description

as per-title, since we almost finish all features for the first version. I think it's a good time to introduce how to release and how to verify release doc for paimon-rust.
Since i got some experience on release fluss-rust, I'm happy to take over it.

Willingness to contribute

• I'm willing to submit a PR!