suggest add `select sth ` syntax

[l1t1]

Description

needn't add from clause
such as
select 1,select 1 as a,select 1 a

it isn't supported now

Polars CLI version 0.8.0
Type .help for help.
〉select 1 a;
Error: no table name provided in query
〉select 1 as a;
Error: no table name provided in query
〉select 1 ;
Error: no table name provided in query
〉create table t(a int);
Error: only CREATE TABLE AS SELECT is supported
〉create table as select 1 a;
Error: sql parser error: Expected end of statement, found: select at Line: 1, Column 17