Add "Set as Working Directory" command #1092

Job	Run time
Lint	2m 0s
Python Tests (ubuntu-latest, 3.8)	1m 32s
Check Python types	2m 58s
Python Tests (ubuntu-latest, 3.12)	1m 36s
Test Positron IPyKernel (ubuntu-latest, 3.8)	2m 46s
Test Positron IPyKernel (macos-latest, 3.9)	1m 53s
Test Positron IPyKernel (windows-latest, 3.10)	4m 41s
Test Minimum Positron IPyKernel Dependencies (ubuntu-latest, 3.8)	3m 57s
Test TypeScript (ubuntu-latest, 3.x, ts-unit)	3m 18s
Test Positron IPyKernel (ubuntu-latest, 3.11)	2m 38s
Test TypeScript (ubuntu-latest, 3.x, functional)	2m 12s
Test Positron IPyKernel (ubuntu-latest, 3.12)	2m 50s
Test TypeScript (macos-latest, 3.x, ts-unit)	3m 10s
Test TypeScript (macos-latest, 3.x, venv)	3m 53s
Test TypeScript (macos-latest, 3.x, single-workspace)	3m 10s
Test TypeScript (macos-latest, 3.x, debugger)	3m 1s
Test TypeScript (macos-latest, 3.x, functional)	1m 57s
Test TypeScript (macos-latest, 3.x, smoke)	3m 13s
Test TypeScript (windows-latest, 3.x, ts-unit)	9m 32s
Test TypeScript (windows-latest, 3.x, functional)	8m 24s
	1h 8m 41s

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