Introduce CompactedRowWriter

[luoyuxia]

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• I searched in the issues and found nothing similar.

Description

as title. Please refer to https://github.com/apache/fluss/blob/d4a72fad240d4b81563aaf83fa3b09b5058674ed/fluss-common/src/main/java/org/apache/fluss/row/compacted/CompactedRowWriter.java#L71

Willingness to contribute

• I'm willing to submit a PR!

[Kelvinyu1117]

Just to confirm, I should only submit the CompactedRowWriter for this task?
It depends on the CompactedRow as well isn't it? So should I raise the PR for #110 firstly?

Also, for the design, should the writer own the buffer like the Java implementation? Or it should just borrow it and own the "view" of the bytes.

[luoyuxia]

Just to confirm, I should only submit the CompactedRowWriter for this task? It depends on the CompactedRow as well isn't it? So should I raise the PR for #110 firstly?

Yes, you should only submit the CompactedRowWriter for this task.
I think CompactedRow depends on CompactedRowWriter since CompactedRowWriter is write bytes in compacted way, and CompactedRow is to parse the bytes to row value.
But anyway, it depends on you since you're the code developer. Feel free to take ways that's convenient for you .

Also, for the design, should the writer own the buffer like the Java implementation? Or it should just borrow it and own the "view" of the bytes.

I think the writer own the buffer.