Support CLI to execute multiple statements

[xd1313113]

Relevant Issue/Bug

We are support parsing multiple statements in AST parser, but CLI supports only one statement at a time.

partiql ▶ SELECT a FROM T as t1 WHERE b = (SELECT t2.b FROM T AS t2 WHERE t2.b = t2.b);
   | SELECT a FROM T as t1 WHERE b = (SELECT t2.b FROM T AS t2 WHERE t2.b = t2.b);

Expected exactly one statement, got: 2

Requested Solution/Feature

Support CLI to execute multiple statements

Describe Alternatives

Execute statement one by one

Additional Context

spec, shall we execute sequentially or async execution.

DoD (Definition of Done)

List set of criteria that characterize this issue as DONE or COMPLETED.