refactor: rename base validator to sample validator in source and documentation

packages/ui/src/validators/index.ts

@@ -1 +1 @@
-export * from './base.validator';
+export * from './sample.validator';

packages/ui/src/validators/sample.validator.ts

@@ -1,6 +1,6 @@
 import { z } from 'zod';
 
-export const baseValidator = z.object({
+export const sampleValidator = z.object({
   email: z.string().email({
     message: JSON.stringify({ key: 'validation:invalid_email' }),
   }),
@@ -12,4 +12,4 @@ export const baseValidator = z.object({
   }),
 });
 
-export type BaseValidatorType = z.infer<typeof baseValidator>;
+export type SampleValidatorType = z.infer<typeof sampleValidator>;