Add conformance testing CI pipeline #230

Job	Run time
checks / pre-commit	37s
checks / readme-snippets	14s
checks / test (3.10, locked, ubuntu-latest)	44s
checks / test (3.10, lowest-direct, windows-latest)	2m 23s
checks / test (3.11, locked, ubuntu-latest)	47s
checks / test (3.11, lowest-direct, ubuntu-latest)	44s
checks / test (3.13, lowest-direct, ubuntu-latest)	43s
checks / test (3.12, locked, ubuntu-latest)	46s
checks / test (3.11, locked, windows-latest)	2m 36s
checks / test (3.12, lowest-direct, windows-latest)	3m 23s
checks / test (3.11, lowest-direct, windows-latest)	2m 57s
checks / test (3.12, locked, windows-latest)	3m 56s
checks / test (3.10, locked, windows-latest)	2m 28s
checks / test (3.13, lowest-direct, windows-latest)	2m 23s
checks / test (3.13, locked, ubuntu-latest)	42s
checks / test (3.10, lowest-direct, ubuntu-latest)	44s
checks / test (3.13, locked, windows-latest)	2m 23s
checks / test (3.12, lowest-direct, ubuntu-latest)	48s
checks / test (3.14, locked, ubuntu-latest)	2m 22s
checks / test (3.14, locked, windows-latest)	3m 11s
checks / test (3.14, lowest-direct, ubuntu-latest)	1m 6s
checks / test (3.14, lowest-direct, windows-latest)	2m 21s
all-green	5s
	38m 23s

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