feat(api): Add common viewset for public RO list

ref: #663

app/api/viewsets/common.py

@@ -2,8 +2,9 @@ import importlib
 from django.utils.safestring import mark_safe
 
 from rest_framework import viewsets
+from rest_framework_json_api.metadata import JSONAPIMetadata
 from rest_framework.exceptions import APIException
-from rest_framework.permissions import IsAuthenticated
+from rest_framework.permissions import IsAuthenticated, IsAuthenticatedOrReadOnly
 from rest_framework.response import Response
 
 from access.mixins.organization import OrganizationMixin
@@ -764,6 +765,17 @@ class ReadOnlyModelViewSet(
 
 
 
+class ReadOnlyListModelViewSet(
+    ModelViewSetBase,
+    List,
+    viewsets.GenericViewSet,
+):
+
+
+    pass
+
+
+
 class AuthUserReadOnlyModelViewSet(
     ReadOnlyModelViewSet
 ):
@@ -789,3 +801,24 @@ class IndexViewset(
         IsAuthenticated,
     ]
 
+
+class PublicReadOnlyViewSet(
+    ReadOnlyListModelViewSet
+):
+    """Public Viewable ViewSet
+
+    User does not need to be authenticated. This viewset is intended to be
+    inherited by viewsets that are intended to be consumed by unauthenticated
+    public users.
+
+    URL **must** be prefixed with `public`
+
+    Args:
+        ReadOnlyModelViewSet (ViewSet): Common Read-Only Viewset
+    """
+
+    permission_classes = [
+        IsAuthenticatedOrReadOnly,
+    ]
+
+    metadata_class = JSONAPIMetadata