initial scaffolding for e2e, smoke, integration tests #1894

Job	Run time
TypeScript Unit Tests (windows-latest)	1m 51s
TypeScript Unit Tests (ubuntu-latest)	42s
Create VSIX	31s
Lint	18s
Smoke Tests (ubuntu-latest)	45s
Smoke Tests (macos-latest)	1m 31s
Smoke Tests (windows-latest)	1m 46s
E2E Tests	0s
Integration Tests	0s
	7m 24s

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