Arithmetic Private Methods Changed to Public

[TheAbsolutionism]

Description

This PR aims to change the exactOperationExists method within the Arithmetic class allowing skript-addons to ensure an operation does or does not already exist if registered by another addon.

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Target Minecraft Versions: any
Requirements: none
Related Issues: #7206

[Moderocky]

Please put a little more effort into writing your PR name/description: these are auto-exported in change history & difference logs and it won't be very clear when searching through the contribution history what "thingy" is or what this is "fixing"

[UnderscoreTud]

Make exactDifferenceExists public as well

[Pikachu920]

I think making these public is not the right way for addon devs to accomplish this. if registration fails, a skriptapiexception is thrown and can be caught by the caller

[sovdeeth]

I think making these public is not the right way for addon devs to accomplish this. if registration fails, a skriptapiexception is thrown and can be caught by the caller

I think it'd be nicer to know whether it will works or not prior to doing all the work to make the arithmetic. Do you foresee a reason that exposing these methods would be negative?