Add support for Microsoft SQL server (1000USD Bounty)

[lihaoyi]

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From the maintainer Li Haoyi: I'm putting a 1000USD bounty on this issue, payable by bank transfer on a merged PR implementing this.

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This should be relatively straightforward to add as a new dialect next to Postgres, MySQL, H2, and Sqlite. It should cover as much of the ScalaSQL API as possible, with exceptions or unsupported functionality marked with explanation comments in https://github.com/com-lihaoyi/scalasql/blob/main/scalasql/test/src/ConcreteTestSuites.scala. Tests should follow the existing pattern, and I believe TestContainers which we use for postgres and mysql should already have SQL server containers ready to go

[lihaoyi]

Got for it

[valerii540]

@lihaoyi can I also try to implement this? Or is it considered as already "booked"?

[lihaoyi]

@valerii540 go for it. There's no locking of bounties, they remain open until they are completed

[lihaoyi]

Bumping the bounty from 500USD to 1000USD in view of the large amount of work apparently necessary to do this, as shown by the work that's gone into #29

[lihaoyi]

For anyone reading, @kiendang has agreed to let anyone pick up his PR #29 as the basis for future work. The bounty is still open, so if anyone wants to pick up the torch and bring it across the finish line you're welcome to take a crack at it