Add OurGroceries documentation (#29760)

source/_integrations/ourgroceries.markdown

@@ -0,0 +1,20 @@
+---
+title: OurGroceries
+description: Instructions on how to integrate OurGroceries shopping lists into Home Assistant.
+ha_category:
+  - To-do List
+ha_release: '2023.12'
+ha_iot_class: Cloud Polling
+ha_config_flow: true
+ha_codeowners:
+  - '@OnFreund'
+ha_domain: ourgroceries
+ha_platforms:
+  - todo
+ha_integration_type: integration
+---
+
+This integration connects with an [OurGroceries](https://www.ourgroceries.com/) account and integrates your shopping lists into Home Assistant.
+It adds a [to-do list entity](/integrations/todo) for each shopping list, allowing you to create, update, or delete items on the list from the **To-do list** dashboard.
+
+{% include integrations/config_flow.md %}