BlockView API v2

[PepperCode1]

This pull requests adds the BlockView API v2 module, which solves the issues with and supersedes the existing Rendering Data Attachment v1 module and adds additional features.

The original goal was to interface inject the two interfaces provided by Rendering Data Attachment v1, RenderAttachmentBlockEntity and RenderAttachedBlockView, to allow for an easier to use API. It proved to be impossible to achieve this and still provide a clean API without making a new module, as explained below.

The documentation of RenderAttachedBlockView states that it is guaranteed to be implemented on all instances of BlockRenderView, but this is not the case. The module implementation only guarantees that all WorldView instances implement the interface. RenderAttachedBlockView extends BlockRenderView, meaning that changing the mixin to satisfy the stated contract is not possible; thus, it can be deduced that the mixin is correct but the stated contract is not. However, this does not lead to an easy to use API and makes interface injection of RenderAttachedBlockView impossible.

The BlockView API v2 module was made to solve these issues, solve other issues with Rendering Data Attachment v1, and provide additional features.

• The object that used to be inconsistently termed "Render Data Attachment" or "Render Attachment" has been renamed to "Block Entity Render Data" or simply "Render Data" where sufficient. Only the new terms are used in the new module.
• The documentation was rewritten to be more concise, provide more examples, remove mentions of implementation details, and add concrete requirements for use of certain methods.
• The new FabricBlockView interface supersedes the RenderAttachedBlockView interface.
  • Instead of being implemented on all BlockRenderView instances, as the current contract of RenderAttachedBlockView states, it is implemented on all BlockView instances to provide more flexibility.
  • It contains two new methods, hasBiomes and getBiomeFabric, to allow biome retrieval. This feature is the only way to create biome-dependent block models, as the BlockRenderView provided normally does not have this functionality.
• The new RenderDataBlockEntity interface supersedes the RenderAttachmentBlockEntity interface.

The Rendering Data Attachment v1 module has been deprecated and its documentation has been updated to state the contract that is actually satisfied and link to the v2 replacements. Perfect backward and forward compatibility would result in degraded performance. To compromise, it was observed that the BlockRenderView extension interface is invoked much more frequently than it is implemented, and that the BlockEntity extension interface is implemented much more frequently than it is invoked. As such, it was decided that the v1 RenderAttachedBlockView#getBlockEntityRenderAttachment should proxy to the v2 FabricBlockView#getBlockEntityRenderData and the v2 RenderDataBlockEntity#getRenderData should proxy to the v1 RenderAttachmentBlockEntity#getRenderAttachmentData.

[Technici4n]

Looks amazing! Left a few comments.