Feedback request: additional ClickHouse formats

[slvrtrn]

The following additional formats for input and output data could be implemented in the client:

• XML (output)
• Prometheus (output)
• SQLInsert (output)
• Template (input/output)
• TSKV (input/output)
• Markdown (output)

As we gather feedback on this, please comment if you'd like to have some of these formats implemented and, if possible, a short description of your use case.

[UnamedRus]

JSONEachRowWithProgress for getting some metrics about query execution?