move validationStrings out of strings in lang/form

lang.go

@@ -0,0 +1,22 @@
+package main
+
+type langMeta struct {
+	Name string `json:"name"`
+}
+
+type quantityString struct {
+	Singular string `json:"singular"`
+	Plural   string `json:"plural"`
+}
+
+type adminLang struct {
+	Meta            langMeta                  `json:"meta"`
+	Strings         map[string]string         `json:"strings"`
+	Notifications   map[string]string         `json:"notifications"`
+	QuantityStrings map[string]quantityString `json:"quantityStrings"`
+}
+
+type formLang struct {
+	Strings           map[string]string         `json:"strings"`
+	ValidationStrings map[string]quantityString `json:"validationStrings"`
+}