Add Mealie documentation (#33264)

* Add Mealie documentation

* Update source/_integrations/mealie.markdown

---------

Co-authored-by: c0ffeeca7 <38767475+c0ffeeca7@users.noreply.github.com>

source/_integrations/mealie.markdown

@@ -0,0 +1,28 @@
+---
+title: Mealie
+description: Instructions on how to setup Mealie devices in Home Assistant.
+ha_category:
+  - Calendar
+ha_config_flow: true
+ha_release: 2024.7
+ha_iot_class: Local Polling
+ha_codeowners:
+  - '@joostlek'
+ha_domain: mealie
+ha_platforms:
+  - calendar
+ha_integration_type: integration
+---
+
+The Mealie integration will fetch data from your [Mealie instance](https://mealie.io/).
+
+{% include integrations/config_flow.md %}
+
+## Available calendars
+
+The integration will create a calendar for every type of meal plan:
+
+- Breakfast
+- Lunch
+- Dinner
+- Side