Expand `TABLE` command support

#704 added support for the `CREATE TABLE x AS TABLE y` by adding basic support for the `TABLE` command within the context of a `CREATE` statement. However, as noted in the [Postgres docs](https://www.postgresql.org/docs/current/sql-select.html#SQL-TABLE):

"It can be used as a top-level command or as a space-saving syntax variant in parts of complex queries. Only the WITH, UNION, INTERSECT, EXCEPT, ORDER BY, LIMIT, OFFSET, FETCH and FOR locking clauses can be used with TABLE; the WHERE clause and any form of aggregation cannot be used."

These other cases have yet to be investigated.

結合 PostgreSQL 的 TABLE 文件，檢視 #704 引入的現有 TABLE 支援。確認頂層和允許的子句中仍不受支援的情況；完成表示預期的情況都能一致地解析，並由 repository 的測試涵蓋。

由索引模型根據 Issue 內容生成。