Issue #3508546: Created the accordion and accordion_item components.

Created the accordion and accordion_item components - variables needs to be updated based on the Olivero theme (work in progress)

drupal_cms_olivero/components/accordion/accordion.component.yml

+$schema: https://git.drupalcode.org/project/drupal/-/raw/HEAD/core/assets/schemas/v1/metadata.schema.json
+name: Accordion
+status: experimental
+props:
+  type: object
+  properties:
+    title:
+      type: string
+      title: Title
+      examples:
+        - 'Section Title'
+    description:
+      $ref: json-schema-definitions://experience_builder.module/textarea
+      type: string
+      title: Description
+      description: A brief description for the accordion Section
+      examples:
+        - 'A text content for the accordion section.'
+slots:
+  items:
+    title: Items
+    description: The accordion items