feat: add TextWidget

add TextWidget CRUD api

add basic tests for API

cmd/curl_get_text_widgets_anon.sh

@@ -0,0 +1,13 @@
+#!/usr/bin/env bash
+
+# this should fail, no token provided
+# users need to be authenticated and have been
+# granted access to view text widgets by being given
+# a token
+
+URL='http://127.0.0.1:8000/api/text-widgets'
+
+curl -s -X GET \
+     -H "Accept: application/json" \
+     $URL
+