Refactor authentication actions and add user verification functionality

- Updated signin and signup actions to correctly handle phone number redirection and date of birth formatting.
- Introduced a new user-actions file to implement user verification logic.
- Added an auth guard to restrict access based on user roles.
- Enhanced the auth configuration to include user roles and language settings.
- Improved validation schemas for user input in the signup form.

lib/auth.ts

@@ -6,6 +6,21 @@ import { phoneNumber } from "better-auth/plugins";
 
 const prisma = new PrismaClient();
 export const auth = betterAuth({
+	user: {
+		additionalFields: {
+			role: {
+				type: "string",
+				required: false,
+				defaultValue: "USER",
+				input: false, // don't allow user to set role
+			},
+			lang: {
+				type: "string",
+				required: false,
+				defaultValue: "en",
+			},
+		},
+	},
 	database: prismaAdapter(prisma, {
 		provider: "sqlite", // or "mysql", "postgresql", ...etc
 	}),