Fix multi lvl categories in embedded .xlsx#1330

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MariusOpeepl wants to merge 3 commits intogitbrent:masterfrom opeepl:cat-axis-multi-level-fix

+32-10

Commits on Apr 9, 2024

Fix multi lvl categories in embedded .xlsx
MariusOpeepl
committed

Commits on May 7, 2024

Fixed duplicated shared strings
MariusOpeepl
committed

Commits on May 13, 2024

Minor refactoring and fixed some oversights
MariusOpeepl
committed