feat: add harmonic-wordpress dev environment on Legion

- Add harmonic-wordpress namespace
- WordPress + MySQL deployment with PVCs and ExternalSecrets
- Ingress for dev.harmonic-framework.com via Traefik + cert-manager
- Argo CD Application watching k8s/harmonic-wordpress/
- Add public Gitea repo credential for git.neuralplatform.ai

servers/legion/namespaces.tf

@@ -37,3 +37,13 @@ resource "kubernetes_namespace" "mudcraft" {
     }
   }
 }
+
+resource "kubernetes_namespace" "harmonic_wordpress" {
+  metadata {
+    name = "harmonic-wordpress"
+    labels = {
+      managed-by = "terraform"
+      tier       = "apps"
+    }
+  }
+}