Added Case Provision entity for recording caseworker involvement with cases

modules/opencase_cases/templates/oc-case-provision-content-add-list.html.twig

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+{#
+/**
+ * @file
+ * Default theme implementation to present a list of custom content entity types/bundles.
+ *
+ * Available variables:
+ * - types: A collection of all the available custom entity types/bundles.
+ *   Each type/bundle contains the following:
+ *   - link: A link to add a content entity of this type.
+ *   - description: A description of this content entity types/bundle.
+ *
+ * @see template_preprocess_oc_case_provision_content_add_list()
+ *
+ * @ingroup themeable
+ */
+#}
+{% spaceless %}
+  <dl>
+    {% for type in types %}
+      <dt>{{ type.link }}</dt>
+    {% endfor %}
+  </dl>
+{% endspaceless %}

modules/opencase_cases/templates/oc_case_provision.html.twig

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+{#
+/**
+ * @file oc_case_provision.html.twig
+ * Default theme implementation to present Case Provision data.
+ *
+ * This template is used when viewing Case Provision pages.
+ *
+ *
+ * Available variables:
+ * - content: A list of content items. Use 'content' to print all content, or
+ * - attributes: HTML attributes for the container element.
+ *
+ * @see template_preprocess_oc_case_provision()
+ *
+ * @ingroup themeable
+ */
+#}
+<div{{ attributes.addClass('oc_case_provision') }}>
+  {% if content %}
+    {{- content -}}
+  {% endif %}
+</div>