Add divisions management module with database schema and validation

- Introduced `DivisionsModule` to manage organizational divisions, including read and write controllers.
- Created database migrations for the `divisions` table and related constraints.
- Implemented validation for division name and code with corresponding utility functions.
- Added service and repository layers for handling division data operations.
- Developed unit tests for the divisions service, repository, and controllers to ensure functionality and correctness.
- Updated application module to include the new `ConfigurationModule` for better organization.

src/modules/configuration/configuration.module.ts

@@ -0,0 +1,8 @@
+import { Module } from '@nestjs/common';
+import { DivisionsModule } from './divisions/divisions.module';
+
+@Module({
+  imports: [DivisionsModule],
+  exports: [DivisionsModule],
+})
+export class ConfigurationModule {}