Allow for `CREATE TEMP TABLE`

[teunbrand]

I'd like to be able to do this, and maybe re-use the data table later.

CREATE TEMP TABLE data(x, y) AS (VALUES
  ('A', 5),
  ('B', 2),
  ('C', 4),
  ('D', 7),
  ('E', 6)
)
VISUALISE x, y FROM data
DRAW area
#> Failed to execute query: Data source error: Failed to execute SQL: Parser Error: syntax error at or near "CREATE"
#> LINE 1: ... TABLE "__ggsql_global_cab3d805ac3f47ef93a49a892627e943__" AS CREATE TEMP TABLE data(x, y) AS
#> (VALUES

Currently our options are:

• Use CTE, e.g. WITH data(x, y) AS (VALUES ...). But that doesn't allow you to re-use the data later.
• If you're working in a jupyter notebook, you can split the SQL part from the visualise part and run them in separate cells. This is suboptimal in my opinion.