feat(item-core): add InputFieldError.System for non-field failures

feature/item/core/src/main/kotlin/de/davis/keygo/feature/item/core/presentation/component/KeyGoFormField.kt

@@ -60,6 +60,7 @@ fun KeyGoFormField(
             val text = when (error) {
                 InputFieldError.Empty -> stringResource(R.string.field_blank)
                 InputFieldError.Invalid -> stringResource(R.string.field_invalid)
+                InputFieldError.System -> stringResource(R.string.field_system)
             }
             Text(text = text, color = MaterialTheme.colorScheme.error)
         }

feature/item/core/src/main/kotlin/de/davis/keygo/feature/item/core/presentation/model/InputFieldError.kt

@@ -3,4 +3,5 @@ package de.davis.keygo.feature.item.core.presentation.model
 sealed interface InputFieldError {
     data object Empty : InputFieldError
     data object Invalid : InputFieldError
-}
+    data object System : InputFieldError
+}

feature/item/core/src/main/res/values/strings.xml

@@ -26,4 +26,5 @@
 
     <string name="field_blank">This field can not be blank</string>
     <string name="field_invalid">This input is invalid</string>
-</resources>
+    <string name="field_system">Something went wrong. Please try again.</string>
+</resources>