This PR makes it possible to customize an object inside a section, allowing that object to be used as a default value and not require of x for the elements inside the section. This works by creating an object during #init that includes the type being customized that is checked for and used within a default context. This makes it safer and easier to write expressions that rely on context, because the right type is already known and enforced.
It also helps limit where default values can be used, instead of exposing all possible types through conversion, which could cause issues of confusion.

This class allows the user to input any object that can contain/hold data and customize it in the section, using the respective expressions to the type being built. This does extensive checking and expression handling in #init ensuring that the provided expression can only be used as one type and to check the type is able to be customized.
It is imperative that the type is determined during #init to allow successful parsing and usage of expressions in the section, as this class can be anything.

This class extends Event storing the object being used.
Hopefully to be mainstreamed to all ExpressionSections and/or EffectSections, but some of those classes require special handling, so the current state may not be applicable.
This class connects ExpressionSections to SectionValueExpression

Similar to ExprEventExpression, this class is only used for SectionValueExpression

This class allows registering classes that normally cannot be customized, such as Enums or Registries, to be customized as another type. Example: InventoryType to Inventory.
Also includes disallowing classes/types.

Utility class for registering and disallowing types during the enabling process of Skript.

• Deprecates constructors for EventValueExpression for a Builder.