feat(config): ✨ Add public client configuration to Dex

Adds a new public client configuration to Dex with a specified ID, name, and redirect URIs.

This enhancement allows for public access to Dex, enabling easier integration with external applications.

otc/observability.t09.de/stacks/core/dex/values.yaml

@@ -59,6 +59,11 @@ config:
   enablePasswordDB: false
 
   staticClients:
+    - id: public-client
+      public: true
+      name: 'Public Client'
+      redirectURIs:
+        - 'https://localhost/oidc/callback'
     - id: controller-argocd-dex
       name: ArgoCD Client
       redirectURIs: