feat: device authorization RFC 8628 (#5646)

* device auth: implement the write events

* add grant type device code

* fix(init): check if default value implements stringer

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Co-authored-by: adlerhurst <silvan.reusser@gmail.com>

internal/api/ui/login/static/templates/success.html

@@ -0,0 +1,12 @@
+{{template "main-top" .}}
+
+<div class="lgn-head">
+    <div class="lgn-actions">
+        <i class="lgn-icon-check-solid lgn-primary"></i>
+        <p class="lgn-error-message">
+            {{ .Message }}
+        </p>
+    </div>
+</div>
+
+{{template "main-bottom" .}}