Move to chdb-io and upgrade to libchdb 3.0

Hey, author of chDB here.

Very nice to have this great impl for chdb community!
Would you like to move this repo to chdb-io?
And [libchdb and chdb v3.0.0](https://github.com/chdb-io/chdb/releases/tag/v3.0.0) released with some great changes. Would you like to update to libchdb 3.0. I'd like to help :-)