Update Completions with Type / Function Signature & More

Added

• parser: add more nodes for create policy/alter policy ast (#884)
• parser: cte error handling improvements (#881)
• ide: completions for more clauses in select (#883)
• ide: complete * in select clauses (#880)
• ide: improve select completions with completion marker (#879)
• ide: hover support for subquery columns (#878)
• ide: include types in completions (#877)
• ide: goto def with function param in create op (#876)
• ide: goto def support for domains (#872)
• ide: goto def on multiranges & timestamp timezones (#870)
• ide: function signature in completion (#869)

Changed

• ide: update cast rewrites to support select type 'foo' (#868)

Fixed

• ide: fix column name for real type (#874)
• ide: fix goto def with cte & table of same name (#873)
• parser: fix unicode escape strings being parsed as byte strings (#871)
• ide: fix type alias goto def, bigint -> int8, smallint -> int2, etc. (#867)
• parser: fix parsing cast operator with array type (#866)