Add "Set as Working Directory" command #1091

Job	Run time
Python Tests (ubuntu-latest, 3.8)	1m 33s
Lint	2m 1s
Python Tests (ubuntu-latest, 3.12)	1m 35s
Check Python types	3m 1s
Test Positron IPyKernel (ubuntu-latest, 3.8)	2m 59s
Test Minimum Positron IPyKernel Dependencies (ubuntu-latest, 3.8)	3m 31s
Test Positron IPyKernel (macos-latest, 3.9)	1m 45s
Test Positron IPyKernel (windows-latest, 3.10)	7m 30s
Test TypeScript (ubuntu-latest, 3.x, ts-unit)	3m 36s
Test Positron IPyKernel (ubuntu-latest, 3.11)	3m 0s
Test TypeScript (ubuntu-latest, 3.x, functional)	2m 12s
Test Positron IPyKernel (ubuntu-latest, 3.12)	3m 3s
Test TypeScript (macos-latest, 3.x, ts-unit)	3m 11s
Test TypeScript (macos-latest, 3.x, venv)	3m 36s
Test TypeScript (macos-latest, 3.x, single-workspace)	3m 55s
Test TypeScript (macos-latest, 3.x, debugger)	3m 2s
Test TypeScript (macos-latest, 3.x, functional)	2m 33s
Test TypeScript (macos-latest, 3.x, smoke)	3m 30s
Test TypeScript (windows-latest, 3.x, ts-unit)	11m 1s
Test TypeScript (windows-latest, 3.x, functional)	8m 12s
	1h 14m 46s

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