Var-Length-Numeric encoding?

Hi all, Just out of curiosity. Julian told me TSFiles make use of variable length encoding of numeric types. I would expect the encoding for unsigned integers to be the "ordinary" one where 7 bits of a byte are being used for encoding the numeric value and new bytes are added as long as the fir

I've submitted a PR for issue IOTDB-5879 [https://github.com/apache/iotdb/pull/6257]

First PR to IOTDB, Glad to join the community. Thanks.