feat(bank-accounts): add transaction retrieval and update service logic

- Implemented a new endpoint to fetch transactions for a specific bank account.
- Refactored the bank account service to streamline transaction handling and balance calculations.
- Removed the bank account balance table and adjusted related logic in workflows and services.
- Enhanced transaction mapping to include references to sales and purchase records.

src/generated/prisma/client.ts

@@ -72,11 +72,6 @@ export type BankAccount = Prisma.BankAccountModel
  * 
  */
 export type BankAccountTransaction = Prisma.BankAccountTransactionModel
-/**
- * Model BankAccountBalance
- * 
- */
-export type BankAccountBalance = Prisma.BankAccountBalanceModel
 /**
  * Model Inventory
  *