introduce the category of graded lattices #8917

Job	Run time
Conda (macos, Python 3.13, all)	1h 5m 43s
Conda (windows, Python 3.13, all)	30m 25s
Conda (ubuntu, Python 3.12, all)	1h 7m 34s
Conda (ubuntu, Python 3.12, new)	43m 1s
Conda (ubuntu, Python 3.13, all)	1h 8m 0s
Conda (windows, Python 3.12, all)	30m 3s
Conda (ubuntu, Python 3.11, all)	1h 5m 0s
Conda (macos, Python 3.12, all)	1h 11m 7s
Conda (ubuntu, Python 3.12, all, editable)	1h 13m 35s
	8h 34m 28s

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