fix(migration): add missing rewrite scripts

[TomCools]

Found 2 missing migrations while upgrading the quickstarts again from 1.x to 2.0

• Indictments calls on the constraintstream was removed, but if you had a test for this, the indictment calls were still there after migration.
• ConstraintRef didn't have a package migration for some reason?

[Copilot]

Pull request overview

Adds missing OpenRewrite migrations to support upgrading projects from Timefold Solver 1.x to 2.0 by covering two previously unmigrated APIs.

Changes:

• Add type migration from ai.timefold.solver.core.api.score.constraint.ConstraintRef to ai.timefold.solver.core.api.score.stream.ConstraintRef.
• Add invocation removals for deprecated test API methods SingleConstraintAssertion.indictsWith*(...).
• Extend/adjust corresponding OpenRewrite recipe tests to cover the new migrations.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated no comments.

File	Description
tools/migration/src/main/java/ai/timefold/solver/migration/v2/GeneralTypeChangeMigrationRecipe.java	Adds ChangeType entry for ConstraintRef package relocation.
tools/migration/src/test/java/ai/timefold/solver/migration/v2/GeneralTypeChangeMigrationRecipeTest.java	Adds stub + a focused test verifying ConstraintRef import/type migration.
tools/migration/src/main/java/ai/timefold/solver/migration/v2/GeneralMethodDeleteInvocationMigrationRecipe.java	Removes invocations of now-deleted indictsWith*(...) methods in the legacy test API package.
tools/migration/src/test/java/ai/timefold/solver/migration/v2/GeneralMethodDeleteInvocationMigrationRecipeTest.java	Adds stubs and assertions ensuring the new method-invocation removals are applied.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
100.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud