Adding Monarch Money docs

source/_integrations/monarchmoney.markdown

@@ -0,0 +1,34 @@
+---
+title: SimpleFin
+description: Instructions on the Monarch Money Integration for personal finance.
+ha_category:
+  - Sensor
+ha_iot_class: Cloud Polling
+ha_release: 2024.9
+ha_codeowners:
+  - '@jeeftor'
+ha_domain: monarchmoney
+ha_config_flow: true
+ha_platforms:
+  - sensor
+ha_integration_type: service
+---
+
+[Monarch Money](https://www.monarchmoney.com) is a personal finance aggrigation and budgeting service that ties in with all 3 major financial back ends: Plaid, MX and FinCity.
+
+{% include integrations/config_flow.md %}
+
+
+
+## Setup Guide
+
+This integration supporst both `username` and `password` login as well as accounts configured with `MFA`.
+
+### Accounts & Devices
+
+Each `account` will be set up as a device in Home Assistant, and it will contain the following sensors:
+
+|Sensor|Description|
+|-------|---------------|
+|Balance|Account balance|
+|Age| This sensor shows when the data was retrieved by Monarch's back end |