chore: Add Shopping Assistant component to FastStore schema

[eduardoformiga]

What's the purpose of this pull request?

• Introduced a new Shopping Assistant component schema in schema.json.
• Updated references in cms_content_type__globalsections.jsonc to include the Shopping Assistant.
• Created a new JSONC file for the Shopping Assistant component with its properties and description.

Summary by CodeRabbit

Release Notes

• New Features
  • Shopping Assistant component is now available in the CMS for page editors to use and configure.

[coderabbitai]

Walkthrough

A new ShoppingAssistant component has been introduced to the FastStore CMS system through a dedicated component definition file, integrated into the global sections schema, and registered at the schema level. The schema identifier was removed and base component definitions were deleted from the definitions section.

Changes

Cohort / File(s)	Summary
ShoppingAssistant Component Definition packages/core/cms/faststore/components/cms_component__shoppingassistant.jsonc	New component definition file extending base-component with $componentKey: "ShoppingAssistant", title, description (referencing Agentic CX Dashboard setup), and empty properties object.
Global Sections Integration packages/core/cms/faststore/pages/cms_content_type__globalsections.jsonc	Added #/components/ShoppingAssistant as an allowed sections item reference in the global sections content type's anyOf list.
Schema Registry Updates packages/core/cms/faststore/schema.json	Added components.ShoppingAssistant declaration; removed schema $id identifier; removed $defs.base-component and $defs.base-page-template definitions that may still be referenced elsewhere in the schema.

Estimated code review effort

🎯 4 (Complex) | ⏱️ ~45 minutes

Possibly related PRs

• chore: Rename Webchat to Shopping Assistant and implement new component #3247 — Introduces or renames the ShoppingAssistant component with matching $componentKey and updates corresponding CMS/schema entries and implementation references.
• chore: updates dev with main #3250 — Modifies the schema $id identifier; this PR removes that same identifier, indicating potential coordinated schema restructuring.

Suggested reviewers

• renatomaurovtex

Poem

🛍️ A helper arrives, digitally wise,
Ready to guide with a gleam in its eyes,
Through sections it roams, component so bright,
Shopping Assistant—steering customers right!
✨

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Title check	✅ Passed	The title accurately reflects the main change: adding a new Shopping Assistant component to the FastStore schema across multiple files.

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✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch chore/shopping-assistant-cms-1

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