Additional error reports + Add POLYMOD_STRICT_SYNTAX compiler define

[nykwono]

This PR adds a couple of new error reports to scripted classes including:

• Error when trying to set a variable to be private when it's already public, vice versa.
• Error when there's an overriding function that's also static.

This also adds an additional compiler define "POLYMOD_STRICT_SYNTAX"

This compiler define is as you can guess for if the user wants scripts to have syntax handling to be more similar to Haxe, thus having it be more stricter on when errors are thrown and such.

Right now this define includes error reporting for:

• Having a function that overrides a super class function but doesn't use the override accessor
• Having a function with the override accessor that doesn't override anything
• Having a function with the override accessor with no parent class.
• Having a variable that's inline but also isn't static.

This is currently a draft so I can get feedback on what to change, for other people to test it, in case there's more error reports that I should add before having it ready for review.

[AbnormalPoof]

This is... so peak........