feat: support env vars in dev command #2038

Job	Run time
checks / readme-snippets	12s
checks / pre-commit	32s
checks / test (3.10, locked, windows-latest)	2m 58s
checks / test (3.10, lowest-direct, windows-latest)	2m 41s
checks / test (3.12, locked, windows-latest)	3m 7s
checks / test (3.11, lowest-direct, windows-latest)	2m 45s
checks / test (3.11, locked, ubuntu-latest)	44s
checks / test (3.12, lowest-direct, windows-latest)	3m 44s
checks / test (3.12, lowest-direct, ubuntu-latest)	54s
checks / test (3.14, locked, ubuntu-latest)	2m 17s
checks / test (3.10, lowest-direct, ubuntu-latest)	52s
checks / test (3.11, locked, windows-latest)	2m 34s
checks / test (3.10, locked, ubuntu-latest)	48s
checks / test (3.11, lowest-direct, ubuntu-latest)	50s
checks / test (3.12, locked, ubuntu-latest)	54s
checks / test (3.14, lowest-direct, windows-latest)	2m 17s
checks / test (3.14, lowest-direct, ubuntu-latest)	1m 7s
checks / test (3.14, locked, windows-latest)	3m 13s
checks / test (3.13, locked, windows-latest)	2m 20s
checks / test (3.13, lowest-direct, windows-latest)	2m 30s
checks / test (3.13, locked, ubuntu-latest)	46s
checks / test (3.13, lowest-direct, ubuntu-latest)	50s
all-green	3s
	38m 58s

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