e2e testing on Nintendo Switch

[twometresteve]

Goal

Get e2e tests running on Nintendo Switch.

@joshedney I would be grateful if you could sanity check this PR in conjunction with the associate PR for Switch (private repo) before I put it into full reivew.

Design

This change extends the existing use of the Maze Runner /command pattern to control the behaviour of the Switch during tests.

Building the test fixture and running the tests is documented in our private Switch repo.

Changeset

Additional logic added as needed for Switch, utilising Nintendo SDK executables as needed to launch/terminate the test fixture app.

Testing

All e2e tests now run against our Switch dev kit (with some failures to be processed).