refactor: extract CLI execution into cliExec module with improved UX #2271

Job	Run time
Integration Test (VS Code stable)	46s
Lint	1m 0s
Unit Test (Electron latest)	53s
Unit Test (Electron 37)	1m 3s
Integration Test (VS Code 1.106.0)	39s
Package	24s
	4m 45s

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