Add Reader and Writer protocols #1981

Job	Run time
Lint	5s
Run tests (3.9)	6s
Run tests (3.9.12)	12s
Run tests (3.10)	20s
Run tests (3.10.4)	12s
Run tests (3.11)	7s
Run tests (3.11.0)	13s
Run tests (3.12)	10s
Run tests (3.12.0)	28s
Run tests (3.13)	10s
Run tests (3.13.0)	17s
Run tests (pypy3.9)	9s
Run tests (pypy3.10)	8s
Create an issue if daily tests failed	0s
	2m 37s

Provide feedback