add ClickHouse support

[modelorona]

hey! I managed to get some code in to support ClickHouse. Never used it before but figured it was a good learning opportunity.

I've tested it with the sample db here: https://clickhouse.com/docs/en/getting-started/example-datasets/nyc-taxi and so far it's working fine.

You'll probably have more to test it with :)

[hkdeman]

This is great! Checking this out :)

[modelorona]

table is visible

data is visible

changing passenger count to 102

deleted first two rows

added row

[modelorona]

will check these merged changes locally

[modelorona]

worked fine on my machine :))

[modelorona]

also this does not have the chat capability, I wasn't able to get around to it. could be for someone else to pick up :))

[hkdeman]

Looks good! Will merge this and see if I can add the chat functionality.