Add Reader and Writer protocols #1928

Job	Run time
Lint	6s
Run tests (3.8)	10s
Run tests (3.9)	7s
Run tests (3.9.12)	13s
Run tests (3.10)	6s
Run tests (3.10.4)	13s
Run tests (3.11)	11s
Run tests (3.11.0)	13s
Run tests (3.12)	6s
Run tests (3.12.0)	13s
Run tests (3.13)	5s
Run tests (3.13.0)	12s
Run tests (pypy3.8)	19s
Run tests (pypy3.9)	7s
Run tests (pypy3.10)	11s
Create an issue if daily tests failed	0s
	2m 32s

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