feat: enhance LDAP integration with new configuration options and browsing capabilities

backend/internal/config/config.go

@@ -16,11 +16,9 @@ type Config struct {
 }
 
 type LDAPConfig struct {
-	Host         string `json:"host"`
-	Port         int    `json:"port"`
-	BaseDN       string `json:"base_dn"`
-	BindDN       string `json:"bind_dn"`
-	BindPassword string `json:"bind_password"`
+	Url       string `json:"url"`
+	AdminUser string `json:"admin_user"`
+	AdminPass string `json:"admin_pass"`
 }
 
 // ErrRequireSetup is returned when config is missing or empty,