Avoid newlines for SET statements

Describe the Feature

Avoid newlines for SET statements.

Current:

SET
    statement_timeout = 0;
SET
    lock_timeout = 0;
SET
    idle_in_transaction_session_timeout = 0;
SET
    transaction_timeout = 0;
SET
    client_encoding = 'UTF8';
SET
    standard_conforming_strings = on;

Wanted:

SET statement_timeout = 0;
SET lock_timeout = 0;
SET idle_in_transaction_session_timeout = 0;
SET transaction_timeout = 0;
SET client_encoding = 'UTF8';
SET standard_conforming_strings = on;

Why do you want this feature?
Denser format.

The issue does not name files or tests; start by locating the SQL formatter logic that handles SET statements and its existing formatting tests. Add coverage for the shown SET examples and confirm the output keeps each statement on one line.