Support more FROM clause items

[abcd-ts]

• Support column aliases
• Support WITH ORDINARITY

column aliases

input

select
  t.id,
  t.name
from
  tbl t(id, name);

error

Unexpected syntax error: ensure_kind(): excepted node is identifier, but actual (
  |
5 |   tbl t(id, name);
  |        ^ Appears as "(" node on the CST
  |

WITH ORDINARITY

input

SELECT * FROM pg_ls_dir('.') WITH ORDINALITY AS t(ls,n);

error

Validation Error: different kind token: Errors have occurred near the following token
  |
1 | SELECT * FROM pg_ls_dir('.') WITH ORDINALITY AS t(ls,n);
  |                              ^^^^
  |

references

• WITH ORDINALITY
• from_item