Add Reader and Writer protocols #1980

Job	Run time
Lint	8s
Run tests (3.9)	4s
Run tests (3.9.12)	12s
Run tests (3.10)	6s
Run tests (3.10.4)	12s
Run tests (3.11)	6s
Run tests (3.11.0)	17s
Run tests (3.12)	5s
Run tests (3.12.0)	14s
Run tests (3.13)	7s
Run tests (3.13.0)	12s
Run tests (pypy3.9)	9s
Run tests (pypy3.10)	17s
Create an issue if daily tests failed	0s
	2m 9s

Provide feedback