Add optional namespace arguments for `make_class` (#1203) #735

Job	Run time
Check types using pyright	25s
Verify dev env (ubuntu-latest)	21s
Build docs & run doctests	29s
Verify dev env (windows-latest)	1m 10s
Tests & Mypy on 3.7	45s
Tests & Mypy on 3.8	1m 4s
Tests & Mypy on 3.9	1m 1s
Tests & Mypy on 3.10	1m 6s
Tests & Mypy on 3.11	1m 16s
Tests & Mypy on 3.12	1m 12s
Tests & Mypy on pypy-3.8	56s
Tests & Mypy on pypy-3.9	54s
Tests & Mypy on pypy-3.10	57s
Combine & check coverage.	12s
required-checks-pass	2s
	11m 50s

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