feat(data/int/basic): coercion subtraction inequality (#10054)
feat(data/int/basic): coercion subtraction inequality (#10054)

Adding to simp a subtraction inequality over coercion from int to nat



Co-authored-by: cocohearts <6e9cc4b75ab48ead7c00feebd414b92922b2dea9@users.noreply.github.com>

leanprover-community/mathlib,leanprover-community/mathlib