Add Reader and Writer protocols #1927

Job	Run time
Lint	8s
Run tests (3.8)	14s
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)	7s
Run tests (3.11.0)	13s
Run tests (3.12)	11s
Run tests (3.12.0)	13s
Run tests (3.13)	9s
Run tests (3.13.0)	12s
Run tests (pypy3.8)	19s
Run tests (pypy3.9)	13s
Run tests (pypy3.10)	7s
Create an issue if daily tests failed	0s
	2m 40s

Provide feedback