Backend: Add Kotlin mixins

[ThatGravyBoat]

What

This adds an annotation processor to allow for a new form of mixin creation called KMixin these allow for a more defined specified control of mixins, unlike normal mixins these are written in Kotlin only.

The following is the specification of the current KMixin.

• KMixin is defined by either the @KMixin annotation or @KPseudoMixin
• KMixins can only be defined on an object
• Mixins can contain other code other than injects and redirects, these unlike normal mixins wont be copied to the mixined class.
• If you need the instance of the class you are mixining into in a function you can use the @KSelf annotation along with a variable and the type of the class
• If you need to shadow a field you can do @KShadow and then the name of the field and then the type
• Additionally you can do @KShadow(ShadowKind.METHOD) to shadow a method, to do this you must have the type be a function of the arguments and return of the method you want to shadow.
• If an inject needs to be applied to a static method you can use the @KStatic annotation
• For redirects of methods you use the @KRedirectCall annotation
• For redirecting fields you use the @KRedirectField annotation, depending on the return type and the arguments it will determine if this is a redirect of a get or put field.
• For basic injects you use the @KInject annotation.
• For injects which need to inject a specific method you use the @KInjectAt annotation.

Note

More injectors can easily be added by adding a new InjectorSerializer to the Injectors.serializers map

Changelog Technical Details

• Added KMixin (Kotlin mixins). - ThatGravyBoat

[CalMWolfs]

worked for me

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Conflicts have been resolved! 🎉

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This pull request has conflicts with the base branch "beta". Please resolve those so we can test out your changes.

[github-actions]

Conflicts have been resolved! 🎉

[github-actions]

This pull request has conflicts with the base branch "beta". Please resolve those so we can test out your changes.