Turducken: Add the ability to run a sql: block in VSCode

[lloydtabb]

In VSCode I would like to be able to run a SQL block. We should also allow this from malloy.ts.

The use case here are sql blocks for transformation.

sql: make_stuff is {
  select:  """CREATE TABLE stuff AS ({% make->stuff %})"""
  connection: "bigquery"
}

[mtoy-googly-moogly]

If we did something like this, it would probably be

sql: {
  ddl: SQL_STRING
  connection: ...
}

No "name" would be allowed and you wouldn't use select: ... and ... ugh ... it's at least a day to get it working, it breaks everything I just did.

I'd rather see this in the command line tool which lets you embed Malloy in an SQL file.

[mtoy-googly-moogly]

this is done, right?