Add Reader and Writer protocols #1974

Job	Run time
Lint	6s
Run tests (3.9)	8s
Run tests (3.9.12)	11s
Run tests (3.10)	7s
Run tests (3.10.4)	13s
Run tests (3.11)	5s
Run tests (3.11.0)	13s
Run tests (3.12)	6s
Run tests (3.12.0)	14s
Run tests (3.13)	7s
Run tests (3.13.0)	12s
Run tests (pypy3.9)	10s
Run tests (pypy3.10)	6s
Create an issue if daily tests failed	0s
	1m 58s

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