Support more detail in app error messages, refs nais/system#24

Author: kimtore

schema.graphql

@@ -1534,6 +1534,12 @@ type SyncError {
   reconciler: String!
 }
 
+type SynchronizationFailingError implements StateError {
+  detail: String!
+  level: ErrorLevel!
+  revision: String!
+}
+
 """Team type."""
 type Team {
   """The NAIS applications owned by the team."""

src/lib/AppErrorTypeToMessage.svelte

@@ -25,6 +25,9 @@
 				... on InvalidNaisYamlError {
 					detail
 				}
+				... on SynchronizationFailingError {
+					detail
+				}
 				... on NewInstancesFailingError {
 					failingInstances
 				}
@@ -98,7 +101,15 @@
 	{:else if $data.__typename === 'InvalidNaisYamlError'}
 		<div class="wrapper">
 			<Alert variant="error">
-				Nais-yaml might be invalid for application <strong>{app}</strong>.
+					The nais.yaml spec is invalid for application <strong>{app}</strong>.
+					<br>{$data.detail}
+			</Alert>
+		</div>
+	{:else if $data.__typename === 'SynchronizationFailingError'}
+		<div class="wrapper">
+			<Alert variant="error">
+				Application <strong>{app}</strong> failed to synchronize properly. The operation will be retried.
+				<br>{$data.detail}
 			</Alert>
 		</div>
 	{:else if $data.__typename === 'NewInstancesFailingError'}