Merge branch 'bournique-main-patch-83066' into 'main'

Clause 4 restructuring

Closes #242, #244, #248, #253, #260, #272, #273, #274, #275, #276, #277, #281, #282, #283, #284, #286, #287, #239, #240, #241, #243, #247, #258, #261, #265, #266, #267, #268, #269, #270, #278, #279, #280, #285, #288, #289, #291, #87, and #30

See merge request cyber/stan4cr2/en-304-621!58