Drop the vardot/varbase-patches dependency so Varbase AI resolves on the Varbase 9.2.x (Drupal ~11.4) line

Problem/Motivation

Varbase AI 2.0.x already requires Drupal ~11.4, but its composer.json pins vardot/varbase-patches: ~10.1.0. That ties it to the Varbase 10.1 line and makes it fail to resolve on a Varbase 9.2.x (Drupal ~11.4) site, whose vardot/varbase-patches is ~9.2.

Per the Varbase convention, vardot/varbase-patches is managed at the project level in vardot/varbase-project and should not be required by an individual module.

Steps to reproduce

On a Varbase 9.2.x site run composer require drupal/varbase_ai — it fails to resolve because vardot/varbase-patches ~10.1.0 conflicts with the site's vardot/varbase-patches ~9.2.

Proposed resolution

Follow the Varbase Recipes logic — make varbase_ai self-contained:

• Add the setAiContextItemsDefaultScope config action plugin (src/Plugin/ConfigAction/SetAiContextItemsDefaultScope.php) — the same one shipped by Varbase Recipes. It applies a default scope to imported ai_context_item entities after a recipe's content step (Drupal core normalises map fields to {} on config/content import, so the scope cannot be shipped through the YAML — this is the behaviour the old patch provided).
• Remove the vardot/varbase-patches requirement from composer.json so it resolves on every Varbase line (9.2.x, 10.1.x, 11.0.x) — patches are managed at the project level in vardot/varbase-project. Keep the composer.json minimal (core + functional deps, no version field).

Remaining tasks

• ✅ File an issue about this project
• ✅ Addition/Change/Update/Fix to this project
• ✅ Testing to ensure no regression
• ➖ Automated unit/functional testing coverage
• ➖ Developer Documentation support on feature change/addition
• ➖ User Guide Documentation support on feature change/addition
• ➖ UX/UI designer responsibilities
• ➖ Accessibility and Readability
• ❌ Reviewed by a human
• ❌ Code review by maintainers
• ❌ Full testing and approval
• ❌ Credit contributors
• ❌ Review with the product owner
• ❌ Update Release Notes
• ❌ Release

User interface changes

• N/A

API changes

• N/A

Data model changes

• N/A

Release notes snippet

• N/A