Add conformance testing CI pipeline #243

Job	Run time
checks / pre-commit	37s
checks / readme-snippets	12s
checks / test (3.10, lowest-direct, windows-latest)	2m 29s
checks / test (3.12, locked, ubuntu-latest)	52s
checks / test (3.11, lowest-direct, windows-latest)	2m 36s
checks / test (3.11, locked, windows-latest)	2m 29s
checks / test (3.14, lowest-direct, ubuntu-latest)	1m 16s
checks / test (3.13, locked, windows-latest)	2m 21s
checks / test (3.10, locked, windows-latest)	2m 19s
checks / test (3.10, lowest-direct, ubuntu-latest)	45s
checks / test (3.13, lowest-direct, ubuntu-latest)	47s
checks / test (3.13, lowest-direct, windows-latest)	2m 51s
checks / test (3.13, locked, ubuntu-latest)	41s
checks / test (3.11, lowest-direct, ubuntu-latest)	46s
checks / test (3.10, locked, ubuntu-latest)	49s
checks / test (3.12, lowest-direct, windows-latest)	3m 40s
checks / test (3.11, locked, ubuntu-latest)	47s
checks / test (3.12, lowest-direct, ubuntu-latest)	53s
checks / test (3.14, lowest-direct, windows-latest)	2m 29s
checks / test (3.14, locked, windows-latest)	3m 7s
checks / test (3.12, locked, windows-latest)	3m 31s
checks / test (3.14, locked, ubuntu-latest)	2m 18s
all-green	3s
	38m 38s

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