New integration: aten_pe (#11301)

* New integration: aten_pe

* aten_pe: Drop sentence about naming due to changed code

source/_integrations/aten_pe.markdown

@@ -0,0 +1,52 @@
+---
+title: "ATEN Rack PDU"
+description: "Instructions on how to integrate ATEN Rack PDUs into Home Assistant."
+ha_category:
+  - Switch
+ha_release: 0.103
+---
+
+The `aten_pe` integration lets you control [ATEN Rack PDUs](https://www.aten.com/eu/en/products/energy-intelligence-pduupsracks/rack-pdu/) from Home Assistant.
+
+In order to use it, SNMP must be enabled on your PDU. It is recommended to use SNMPv3 to protect your credentials from eavesdropping.
+
+Tested devices:
+  * [PE8324G](https://www.aten.com/eu/en/products/energy-intelligence-pduupsracks/rack-pdu/pe8324/)
+
+To set it up, add the following information to your `configuration.yaml` file:
+
+```yaml
+switch:
+  - platform: aten_pe
+    host: 192.168.0.60
+```
+
+{% configuration %}
+host:
+  description: The IP/host which to control.
+  required: true
+  type: string
+port:
+  description: The port on which to communicate.
+  required: false
+  type: string
+  default: 161
+community:
+  description: community string to use for authentication (SNMP v1 and v2c).
+  required: false
+  type: string
+  default: private
+username:
+  description: Username to use for authentication.
+  required: false
+  type: string
+  default: administrator
+auth_key:
+  description: Authentication key to use for SNMP v3.
+  required: false
+  type: string
+priv_key:
+  description: Privacy key to use for SNMP v3.
+  required: false
+  type: string
+{% endconfiguration %}