chore: merge rest-definition with definition

[rsynek]

Merged rest-definition into definition.

Motivation: 3 classes are not worth keeping in a separate module, if we don't require their separation from other reasons.

[sonarqubecloud]

Quality Gate failed

Failed conditions
0.0% Coverage on New Code (required ≥ 70%)

See analysis details on SonarQube Cloud

[Copilot]

Pull request overview

This PR removes the model/rest-definition module by moving its REST API “definition” types into model/definition and updating downstream modules to import them from the new location.

Changes:

• Moved REST definition types (OperationId, OperationOnPost, DatasetSelector) into timefold-solver-model-definition under ai.timefold.solver.model.definition.api.rest.
• Updated REST implementation, Quarkus deployment processor, and tests to use the new imports.
• Removed the timefold-solver-model-rest-definition Maven module and its BOM entries/dependencies.

Reviewed changes

Copilot reviewed 11 out of 11 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
model/test-model/src/test/java/ai/timefold/solver/model/testmodel/OpenApiTest.java	Updates import to new definition.api.rest package.
model/test-model/src/test/java/ai/timefold/solver/model/testmodel/EmployeeScheduleResourceTest.java	Updates import to new definition.api.rest package.
model/rest/src/main/java/ai/timefold/solver/model/rest/impl/AbstractModelAPIResource.java	Switches REST resource implementation to use the moved REST definition types.
model/rest/pom.xml	Drops dependency on removed timefold-solver-model-rest-definition module.
model/rest-definition/pom.xml	Deletes the rest-definition module POM (module removed).
model/quarkus/deployment/src/main/java/ai/timefold/solver/model/quarkus/deployment/TimefoldModelDescriptorProcessor.java	Updates imports/static import to new definition.api.rest.OperationId.
model/pom.xml	Removes rest-definition from the Maven reactor modules list.
model/definition/src/main/java/ai/timefold/solver/model/definition/api/rest/OperationOnPost.java	Moves type to new package.
model/definition/src/main/java/ai/timefold/solver/model/definition/api/rest/OperationId.java	Moves type to new package.
model/definition/src/main/java/ai/timefold/solver/model/definition/api/rest/DatasetSelector.java	Moves type to new package.
build/bom/pom.xml	Removes BOM-managed dependency entries for the removed artifact.

Comments suppressed due to low confidence (1)

model/definition/src/main/java/ai/timefold/solver/model/definition/api/rest/OperationId.java:1

• The PR description only mentions merging modules, but changing these types’ package (and therefore their fully-qualified names) is a breaking public API change, so either keep the original package names or provide deprecated bridge types (and document the migration).