ISTWCMS-5657: adding yml for ctas

src/patterns/04-components/call-to-action/call-to-action.yml

+ctas:
+  -
+    link: '#'
+    details:
+      -
+        text: 'Small Text Here '
+        type: 'small'
+
+      - text: 'UW WIDE MESSAGE'
+        type: 'big'
+    theme: 'org-default'
+  -
+    link: '#'
+    details:
+      - text: 'Faculty of'
+        type: 'small'
+
+      - text: 'Health'
+        type: 'big'
+    theme: 'org-ahs'
+  -
+    link: '#'
+    details:
+      - text: 'Faculty of'
+        type: 'medium'
+
+      - text: 'Engineering'
+        type: 'big'
+    theme: 'org-eng'
+  - link: '#'
+    details:
+      - text: 'Faculty of'
+        type: 'medium'
+
+      - text: 'Environment'
+        type: 'big'
+    theme: 'org-env'
+  - link: '#'
+    details:
+      - text: 'Faculty of'
+        type: 'small'
+
+      - text: 'Science'
+        type: 'big'
+    theme: 'org-sci'