Add conformance testing CI pipeline #234

Job	Run time
checks / readme-snippets	9s
checks / pre-commit	36s
checks / test (3.10, lowest-direct, ubuntu-latest)	45s
checks / test (3.10, locked, windows-latest)	3m 2s
checks / test (3.10, locked, ubuntu-latest)	48s
checks / test (3.10, lowest-direct, windows-latest)	2m 24s
checks / test (3.12, locked, windows-latest)	3m 33s
checks / test (3.13, lowest-direct, ubuntu-latest)	44s
checks / test (3.13, locked, ubuntu-latest)	42s
checks / test (3.11, locked, ubuntu-latest)	45s
checks / test (3.12, lowest-direct, ubuntu-latest)	47s
checks / test (3.11, locked, windows-latest)	3m 18s
checks / test (3.14, lowest-direct, windows-latest)	2m 21s
checks / test (3.12, lowest-direct, windows-latest)	3m 52s
checks / test (3.14, lowest-direct, ubuntu-latest)	1m 16s
checks / test (3.11, lowest-direct, ubuntu-latest)	50s
checks / test (3.13, lowest-direct, windows-latest)	2m 41s
checks / test (3.13, locked, windows-latest)	2m 25s
checks / test (3.14, locked, ubuntu-latest)	2m 21s
checks / test (3.12, locked, ubuntu-latest)	49s
checks / test (3.11, lowest-direct, windows-latest)	2m 43s
checks / test (3.14, locked, windows-latest)	3m 15s
all-green	4s
	40m 10s

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