Create fortios.markdown (#9044)

* Create device_tracker.fortios.markdown

this is documentation for the initial version of a new device_tracker component named Fortios from Fortinet.

* Update device_tracker.fortios.markdown

* Update device_tracker.fortios.markdown

* Update source/_components/device_tracker.fortios.markdown

Co-Authored-By: Franck Nijhof <frenck@frenck.nl>

* Update source/_components/device_tracker.fortios.markdown

Co-Authored-By: Franck Nijhof <frenck@frenck.nl>

* Update source/_components/device_tracker.fortios.markdown

Co-Authored-By: Franck Nijhof <frenck@frenck.nl>

* Update source/_components/device_tracker.fortios.markdown

Co-Authored-By: Franck Nijhof <frenck@frenck.nl>

* Update source/_components/device_tracker.fortios.markdown

Co-Authored-By: Franck Nijhof <frenck@frenck.nl>

* Update source/_components/device_tracker.fortios.markdown

Co-Authored-By: Franck Nijhof <frenck@frenck.nl>

* Update source/_components/device_tracker.fortios.markdown

Co-Authored-By: Franck Nijhof <frenck@frenck.nl>

* Update device_tracker.fortios.markdown

Added title and description

* Update device_tracker.fortios.markdown

added title

* Update device_tracker.fortios.markdown

added header and removed optional configurations

* ✏️ Tweaks

* 🔥 Removed some obsolete code

* filename changed as requested

* ✏️ Tweaks

* ✏️ Fixing build

* ✏️ Fixes configuration block

source/_components/fortios.markdown

@@ -0,0 +1,42 @@
+---
+title: "Device Tracker FortiOS"
+description: "Instructions on how to use Fortinet FortiOS to track devices in Home Assistant."
+logo: fortinet.png
+ha_category:
+  - Presence Detection
+ha_release: 0.97
+ha_iot_class: Local Polling
+---
+
+This integration enables Home Assistant to do device tracking of devices with a MAC address connected to a FortiGate from [Fortinet](https://www.fortinet.com).
+
+The integration relies on the [fortiosapi](https://pypi.org/project/fortiosapi/).
+The integration has been tested both on FortiGate appliance and FortiGate VM running SW FortiOS v. 6.0.x and 6.2.0.
+
+All devices with a MAC address identified by FortiGate would be tracked, this covers both Ethernet and WiFi devices, including devices detected by LLDP.
+
+The integration is based on the Home Assistant `device_tracker` platform.
+
+```yaml
+# Example configuration.yaml entry
+device_tracker:
+  - platform: fortios
+    host: YOUR_HOST
+    token: YOUR_API_USER_KEY
+```
+
+{% configuration %}
+host:
+    description: Hostname or IP address of the FortiGate.
+    required: true
+    type: string
+token:
+    description: "See [Fortinet Developer Network](https://fndn.fortinet.com) for how to create an API token. Remember this integration only needs read access to a FortiGate, so configure the API user to only to have limited and read-only access."
+    required: true
+    type: string
+verify_ssl:
+    description: If the SSL certificate should be verified. In most home cases users do not have a verified certificate.
+    required: false
+    type: boolean
+    default: false
+{% endconfiguration %}