Add OAuth2 authentication (#147)

- Added Site settings > Authentication section
- Create/edit/delete your custom oauth2 configurations
- Login or signup with oauth2

app/javascript/helpers/formUtils.ts

@@ -0,0 +1,20 @@
+import { FieldError } from "react-hook-form";
+import I18n from 'i18n-js';
+
+export const getLabel = (
+  entity: string,
+  attribute: string,
+) => (
+  I18n.t(`activerecord.attributes.${entity}.${attribute}`)
+);
+
+export const getValidationMessage = (
+  validationType: FieldError['type'],
+  entity: string,
+  attribute: string,
+) => (
+  I18n.t(
+    `common.validations.${validationType}`,
+    { attribute: getLabel(entity, attribute) }
+  )
+);