docs: add Project Setup section to Developer Guide #1761

Job	Run time
Lint	50s
Test with typescript-eslint v7	1m 26s
Test (21, 9)	1m 24s
Test (lts/*, 9)	1m 25s
Test (18, 9)	1m 31s
Test (18, 8)	1m 23s
Test (20, 9)	1m 18s
Test without ESLint Stylistic	1m 18s
	10m 35s

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