initial scaffolding for e2e, smoke, integration tests #1896

Job	Run time
Lint	19s
TypeScript Unit Tests (ubuntu-latest)	37s
TypeScript Unit Tests (windows-latest)	1m 27s
Create VSIX	31s
Smoke Tests (macos-latest)	1m 7s
Smoke Tests (windows-latest)	1m 35s
Smoke Tests (ubuntu-latest)	44s
E2E Tests	0s
Integration Tests	-1s
	6m 19s

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