Add inspection for entrypoints not listed in the fabirc.mod.json

[cputnam-a11y]

Minecraft Development for IntelliJ plugin version

2025.1-1.8.6-590

Description of the feature request

Add an inspection similar to the "add mixin to mixin config" inspection for known entrypoints. As the names are library defined, it could be difficult to support arbitrary entrypoints like fabric asm's early risers without scanning the whole classpath to find uses of FabricLoader#getEntrypoints, FabricLoader#getEntrypointContainers and FabricLoader#invokeEntrypoints, so it could make sense to limit this to ones defined in fabric loader. it would be nice if this also applied to entrypoints, with your cursor jumping to the key field in a template or something