Add noaa_tides documentation (#5881)

* Add noaa_tides documentation

* Remove error on last line

* Formatting fix

* ✏️ Minor tweaks

* Change units to unit_system

* Minor changes

source/_components/sensor.noaa_tides.markdown

@@ -0,0 +1,60 @@
+---
+layout: page
+title: "NOAA Tides"
+description: "Instructions to add NOAA Tide information to Home Assistant."
+date: 2018-07-24 08:00
+sidebar: true
+comments: false
+sharing: true
+footer: true
+ha_category: Weather
+ha_release: 0.75
+logo: noaa.png
+---
+
+The `noaa_tides` sensor platform uses details from [NOAA Tides and Currents](https://tidesandcurrents.noaa.gov/api/) to provide information about the prediction for the tides for any location in the United States.
+
+This sensor requires the use of an NOAA station id. Search [NOAA Tide Predictions](https://tidesandcurrents.noaa.gov/tide_predictions.html) to find a location. Use the Id from the search results in your configuration. Alternately, you can determine a station id from a URL. For example, `8721164` in the following URL `https://tidesandcurrents.noaa.gov/noaatidepredictions.html?id=8721164`
+
+To use this sensor, add the following to your `configuration.yaml` file:
+
+```yaml
+# Example configuration.yaml entry
+sensor:
+  - platform: noaa_tides
+    station_id: 8721164
+```
+
+{% configuration %}
+station_id:
+  description: ID of the station you'd like to track from https://tidesandcurrents.noaa.gov/tide_predictions.html.
+  required: true
+  type: string
+name:
+  description: User supplied sensor name.
+  required: false
+  default: NOAA Tides.
+  type: string
+time_zone:
+  description: User selected timezone.
+  required: false
+  default: Local Standard Time/Local Daylight Time.
+  type: list
+  keys:
+    gmt:
+      description: Greenwich Mean Time.
+    lst:
+      description: Local Standard Time. The time local to the requested station.
+    lst_ldt:
+      description: Local Standard/Local Daylight Time. The time local to the requested station.
+unit_system:
+  description: Specify the unit system.
+  required: false
+  default: Defaults to `metric` or `imperial` based on the Home Assistant configuration.
+  type: string
+  keys:
+    metric:
+      description: Metric (Celsius, meters, cm/s) units.
+    english:
+      description: English (fahrenheit, feet, knots) units.
+{% endconfiguration %}