Enable USG/UDM radius server (#214)

* Enable built-in radius server settings

* Adding documentation

* Update docs with new generator

Co-authored-by: Paul Tyng <paul@paultyng.net>

docs/resources/setting_radius.md

@@ -0,0 +1,33 @@
+---
+# generated by https://github.com/hashicorp/terraform-plugin-docs
+page_title: "unifi_setting_radius Resource - terraform-provider-unifi"
+subcategory: ""
+description: |-
+  unifi_setting_radius manages settings for the built-in RADIUS server.
+---
+
+# unifi_setting_radius (Resource)
+
+`unifi_setting_radius` manages settings for the built-in RADIUS server.
+
+
+
+<!-- schema generated by tfplugindocs -->
+## Schema
+
+### Optional
+
+- `accounting_enabled` (Boolean) Enable RADIUS accounting Defaults to `false`.
+- `accounting_port` (Number) The port for accounting communications. Defaults to `1813`.
+- `auth_port` (Number) The port for authentication communications. Defaults to `1812`.
+- `enabled` (Boolean) RAIDUS server enabled. Defaults to `true`.
+- `interim_update_interval` (Number) Statistics will be collected from connected clients at this interval. Defaults to `3600`.
+- `secret` (String, Sensitive) RAIDUS secret passphrase. Defaults to ``.
+- `site` (String) The name of the site to associate the settings with.
+- `tunneled_reply` (Boolean) Encrypt communication between the server and the client. Defaults to `true`.
+
+### Read-Only
+
+- `id` (String) The ID of the settings.
+
+