Add support for classes #87

Job	Run time
validate-matrix-macos (macos-13, 3.11)	15s
validate-matrix-linux (ubuntu-22.04, 3.11)	12s
validate-matrix-macos (macos-13, 3.12)	20s
validate-matrix-windows (windows-2019, 3.11)	33s
validate-matrix-linux (ubuntu-22.04, 3.12)	10s
validate-matrix-macos (macos-14, 3.11)	11s
validate-matrix-windows (windows-2019, 3.12)	31s
validate-matrix-linux (ubuntu-24.04, 3.11)	15s
validate-matrix-macos (macos-14, 3.12)	10s
validate-matrix-windows (windows-2022, 3.11)	27s
validate-matrix-linux (ubuntu-24.04, 3.12)	10s
validate-matrix-macos (macos-15, 3.11)	9s
validate-matrix-windows (windows-2022, 3.12)	32s
validate-matrix-macos (macos-15, 3.12)	8s
	4m 3s

Provide feedback