[Test]MainEntry point for qn test. The runner synthesizes use test, a glob of the caller's test directory (each suite self-registers into [Test]Suites as it loads), and finally a call to [Test]Main.run — whose value is the program's value, so a false result makes qn test exit non-zero.
Run every suite registered in [Test]Suites with an AnsiTestReporter on stdout. Answers true when no test failed — the program's value, hence qn test's exit status.