Transaction Backend Pt.2

[DiegolMarques]

Branch name: transaction-create-delete

Task at Hand

1. Create and implement in controllers/transactions.ts:
   • createTransaction with proper validation
   • deleteTransaction with cleanup
2. Implement corresponding routes in routes/transactions.ts:
   • POST /transactions
   • DELETE /transactions/:id

Testing

Test all routes by creating a testing page on the testing folder. Use backend-test for reference.