Add new boolean operators

[stephenquan]

Document the new boolean operators that are being introduced in https://github.com/CommunityToolkit/Maui/issues/2181

[learn-build-service-prod[bot]]

Learn Build status updates of commit 8ebe1bc:

:white_check_mark: Validation status: passed

File	Status	Preview URL	Details
docs/maui/includes/math-expression-operations.md	:white_check_mark:Succeeded	View

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