initial scaffolding for e2e, smoke, integration tests #1906

Job	Run time
TypeScript Unit Tests (ubuntu-latest)	39s
Lint	18s
Create VSIX	34s
TypeScript Unit Tests (windows-latest)	1m 35s
Smoke Tests (windows-latest)	1m 19s
Smoke Tests (macos-latest)	52s
Smoke Tests (ubuntu-latest)	36s
Integration Tests	0s
E2E Tests	0s
	5m 53s

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