Add optional namespace arguments for `make_class` #733

Job	Run time
Build docs & run doctests	23s
Check types using pyright	32s
Verify dev env (ubuntu-latest)	16s
Verify dev env (windows-latest)	1m 4s
Tests & Mypy on 3.7	46s
Tests & Mypy on 3.8	1m 0s
Tests & Mypy on 3.9	1m 1s
Tests & Mypy on 3.10	1m 17s
Tests & Mypy on 3.11	1m 18s
Tests & Mypy on 3.12	1m 14s
Tests & Mypy on pypy-3.8	56s
Tests & Mypy on pypy-3.9	55s
Tests & Mypy on pypy-3.10	56s
Combine & check coverage.	7s
required-checks-pass	2s
	11m 47s

Provide feedback