FANNG

@coolderli , thanks for proposing the base PR for Flink, a big step!

> Hi @FANNG1 could you help review this pr when you are free? ok

LGTM except two comments

@caican00 could you rebase with lattest code?

@caican00 ,merged in main, thanks for your work

Overal LGTM, except minor comments

@SteNicholas , as Gravitino 0.5 is planned to be released at 4.19, only contains Paimon skeleton code seems not too much benefit to end users, I prefer to delay the...

> @FANNG1, make sense to me. I will push other pull requests of Paimon catalog based on this pull request and compared with this pull request. WDYT? ok

@SteNicholas thanks for your work, could you split into smaller PR? like: 1. code skeleton 2. integrate test skeleton 3. schema operations 4. basic table operations 5. more advanced features...

> @FANNG1, IMO, splitting this pull request have certain works. Could this pull request take a review firstly? sure, but we're struggling for 0.5 release recent days, plan to review...