initial scaffolding for e2e, smoke, integration tests #1897

Job	Run time
Create VSIX	37s
TypeScript Unit Tests (windows-latest)	1m 23s
Lint	18s
TypeScript Unit Tests (ubuntu-latest)	37s
Smoke Tests (macos-latest)	1m 19s
Smoke Tests (ubuntu-latest)	51s
Smoke Tests (windows-latest)	2m 12s
E2E Tests	-1s
Integration Tests	-1s
	7m 15s

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