Show inherited methods with relationships

[samuel-williams-shopify]

Move inherited method links into the compact relationship metadata beneath each reference title.

Methods are grouped by the direct relationship through which they become available:

• superclass methods follow Inherits from
• included, prepended, and extended module methods follow their corresponding relationship
• transitive methods remain grouped under the immediate provider, while links target their actual definitions

This removes the separate Inherited Methods section.

Checks

• bundle exec bake test
• bundle exec rubocop