Remove metadata items from Contains lists in definition pages

Per the EBNF grammar, terms, options, and author references are
metadata (with { } blocks), not body definitions. Author
definitions only occur in Module and Domain bodies.

- domain.md: Remove Options and Terms (keep Authors — correct)
- context.md: Remove Authors and Terms
- entity.md: Remove Authors, Options, and Terms
- projector.md: Remove Authors, Options, and Terms
- adaptor.md: Remove Authors and Terms

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: respencer-ncl

docs/riddl/concepts/adaptor.md

@@ -98,6 +98,4 @@ these models so neither context needs to know about the other's terminology.
 * [Contexts](context.md)
 
 ## Contains
-* [Authors](author.md)
 * [Handlers](handler.md)
-* [Terms](term.md)

docs/riddl/concepts/context.md

@@ -67,13 +67,11 @@ from DDD Europe 2020 conference.
 
 ## Contains
 * [Adaptors](adaptor.md)
-* [Authors](author.md)
 * [Entities](entity.md)
 * [Functions](function.md)
 * [Handlers](handler.md)
 * [Includes](include.md)
 * [Processors](processor.md)
 * [Projectors](projector.md)
 * [Sagas](saga.md)
-* [Terms](term.md)
 * [Types](type.md)

docs/riddl/concepts/domain.md

@@ -43,18 +43,16 @@ might devise a domain hierarchy like this:
 Within a domain, you can define these things:
 
 * [Actors](user.md) - someone or thing that uses the domain
-* [Applications](application.md) - a user interface  
+* [Applications](application.md) - a user interface
 * [Authors](author.md) - who defined the domain
-* [Contexts](context.md) - a precisely defined bounded context within the domain
+* [Contexts](context.md) - a precisely defined bounded context
+  within the domain
 * [Domains](domain.md) :material-recycle: - domains
   can have nested domains (subdomains)
 * [Epics](epic.md) - a story about external entities
   interacting with the domain
 * [Includes](include.md) - inclusion of entity content from a
   file
-* [Options](option.md) - optional declarations about a 
-  definition
-* [Terms](term.md) - definition of a term relevant to the
-  domain
 * [Types](type.md) - information definitions used throughout
   the domain
+

docs/riddl/concepts/entity.md

@@ -127,12 +127,10 @@ API, etc.) to make implementation decisions.
 
 ## Contains
 
-* [Authors](author.md) - define who the authors of the entity are
 * [Functions](function.md) - named definitions of processing
 * [Handlers](handler.md) - how to handle messages sent to an entity
 * [Includes](include.md) - inclusion of entity content from a file
-* [Invariants](invariant.md) - logical expressions that must always hold true
-* [Options](option.md) - define translation options for the entity
+* [Invariants](invariant.md) - logical expressions that must always
+  hold true
 * [States](state.md) - the data an entity holds
 * [Types](type.md) - the definition of a type of information
-* [Terms](term.md) - the definition of a term related to the entity

docs/riddl/concepts/projector.md

@@ -23,9 +23,6 @@ data. Typically persistent entities are the system of record.
 * [Contexts](context.md)
 
 ## Contains
-* [Authors](author.md)
 * [Fields](field.md)
 * [Handlers](handler.md)
 * [Includes](include.md)
-* [Options](option.md)
-* [Terms](term.md)