Create table support

Related https://github.com/clach04/SQLshite/issues/20

  1. Column name
  2. Unique
  3. Nullable
  4. Datatype
  5. Length (maybe ignored)
  6. Default value
      * Null
      * empty string?
      * 0
      * 1
      * today
      * now
      * modified time? Trigger that updates on every change to row
      * custom value
  7. Custom default value