Add documentation for Garmin Connect (home-assistant#11752)

* Added documentation for the Garmin Connect integration

* Added logo
Removed hyphens from text

* Applied suggested changes

Fixed wrongly documented resource variable

* Renamed config option to reflect code

* Updated to reflect code changes

source/_integrations/garmin_connect.markdown

@@ -0,0 +1,110 @@
+---
+title: Garmin Connect
+description: Instructions on how to configure the Garmin Connect integration for Home Assistant.
+logo: garmin_connect.png
+ha_category:
+  - Health
+ha_iot_class: Cloud Polling
+ha_release: 0.105
+ha_codeowners:
+  - '@cyberjunky'
+---
+
+The Garmin Connect sensor allows you to expose data from [Garmin Connect](https://connect.garmin.com) to Home Assistant.
+
+## Configuration
+
+
+To add Garmin Connect to your installation, go to Configuration >> Integrations in the UI and enable the Garmin Connect integration by entering your credentials.
+
+After succesful login a standard set of sensors are enabled.
+You can enable more if needed by using the Integrations page.
+
+
+Please be aware that Garmin Connect has very low rate limits, max. once every ~10 minutes.
+
+
+## Available Sensors
+
+Not every sensor holds meaningful values, it depends on the tracking device you use, and the apps you have connected.
+
+Enabled by default:
+
+```text
+Total Steps
+Daily Step Goal
+Total KiloCalories
+Active KiloCalories
+BMR KiloCalories
+Consumed KiloCalories
+Burned KiloCalories
+Total Distance Mtr
+Active Time
+Sedentary Time
+Sleeping Time
+Awake Duration
+Sleep Duration
+Floors Ascended
+Floors Descended
+Floors Ascended Goal
+Min Heart Rate
+Max Heart Rate
+Resting Heart Rate
+Avg Stress Level
+Max Stress Level
+Rest Stress Duration
+Activity Stress Duration
+Uncat. Stress Duration
+Total Stress Duration
+Low Stress Duration
+Medium Stress Duration
+High Stress Duration
+Body Battery Charged
+Body Battery Drained
+Body Battery Highest
+Body Battery Lowest
+Body Battery Most Recent
+Average SPO2
+Lowest SPO2
+Latest SPO2
+Highest Respiration
+Lowest Respiration
+Latest Respiration
+```
+
+
+Disabled by default:
+
+```text
+Remaining KiloCalories
+Net Remaining KiloCalories
+Net Calorie Goal
+Wellness Start Time
+Wellness End Time
+Wellness Description
+Wellness Distance Mtr
+Wellness Active KiloCalories
+Wellness KiloCalories
+Highly Active Time
+Floors Ascended Mtr
+Floors Descended Mtr
+Min Avg Heart Rate
+Max Avg Heart Rate
+Abnormal HR Counts
+Last 7 Days Avg Heart Rate
+Stress Qualifier
+Stress Duration
+Stress Percentage
+Rest Stress Percentage
+Activity Stress Percentage
+Uncat. Stress Percentage
+Low Stress Percentage
+Medium Stress Percentage
+High Stress Percentage
+Latest SPO2 Time
+Average Altitude
+Moderate Intensity
+Vigorous Intensity
+Intensity Goal
+Latest Respiration Update
+```