Add API documentation for TrackGo HTTP API and enhance employee management features

- Created a new `api.md` file detailing the TrackGo HTTP API, including authentication, user management, and employee operations.
- Updated `Employee` type to simplify user relation handling by replacing `UserRelation` with a more concise structure.
- Enhanced filtering capabilities in employee queries to support an array of positions.
- Refactored employee-related services and repositories to accommodate the new position filtering logic.
- Added unit and e2e tests to validate the new API documentation and employee management functionalities.

src/modules/configuration/employees/employees.repository.ts

@@ -5,7 +5,7 @@ import {
   NotFoundException,
 } from '@nestjs/common';
 import { and, count, eq, ilike, inArray, or, SQL } from 'drizzle-orm';
-import { toOrderClauses } from '../../../common/http/response';
+import { toOrderClauses } from '../../../common/http/response/order-clause';
 import { attachAuditUsers } from '../../../database/load-user-refs';
 import { DateTime } from '../../../common/value-objects/date-time/date-time';
 import { PhoneNumber } from '../../../common/value-objects/phone-number/phone-number';
@@ -252,8 +252,8 @@ export class EmployeesRepository {
     if (filters.phone) {
       parts.push(ilike(employees.phone, `%${filters.phone}%`));
     }
-    if (filters.position) {
-      parts.push(eq(employees.position, filters.position));
+    if (filters.position && filters.position.length > 0) {
+      parts.push(inArray(employees.position, [...filters.position]));
     }
     if (filters.status) {
       parts.push(eq(employees.status, filters.status));