Improve rate limit exceeded error message

Packages/Pachyderm/Sources/Pachyderm/Client.swift

@@ -508,6 +508,8 @@ extension Client {
             // todo: support more status codes
             case .unexpectedStatus(413):
                 return "HTTP 413: Payload Too Large"
+            case .unexpectedStatus(429):
+                return "HTTP 429: Rate Limit Exceeded"
             case .unexpectedStatus(let code):
                 return "HTTP Code \(code)"
             case .invalidRequest:

Tusker/Views/Toast/ToastConfiguration.swift

@@ -85,6 +85,8 @@ fileprivate extension Pachyderm.Client.Error {
         switch type {
         case .networkError(_):
             return "wifi.exclamationmark"
+        case .unexpectedStatus(429):
+            return "clock.badge.exclamationmark"
         default:
             return "exclamationmark.triangle"
         }