feat(ui): settings menu restructure, git branch dropdown, and repo cleanup

static/lang/de.json

@@ -93,16 +93,19 @@
   },
   "settings": {
     "title": "Systemeinstellungen",
-    "tabSystem": "Systemkonfiguration",
-    "tabNpm": "NPM Integration",
-    "tabImages": "Docker Images",
+    "tabSystem": "NetBird MSP System",
+    "tabNpm": "NPM Proxy",
+    "tabImages": "NetBird Docker Images",
     "tabBranding": "Branding",
     "tabUsers": "Benutzer",
     "tabAzure": "Azure AD",
     "tabDns": "Windows DNS",
     "tabLdap": "LDAP / AD",
-    "tabUpdate": "Updates",
+    "tabUpdate": "NetBird MSP Updates",
     "tabSecurity": "Sicherheit",
+    "groupUsers": "Benutzerverwaltung",
+    "groupSystem": "Systemkonfiguration",
+    "groupExternal": "Umsysteme",
     "baseDomain": "Basis-Domain",
     "baseDomainPlaceholder": "ihredomain.com",
     "baseDomainHint": "Kunden erhalten Subdomains: kunde.ihredomain.com",