Database Transaction Feature

[esmaeelghasemi]

🛠️ Added Database Transaction Feature

This PR introduces a database transaction system that provides complete control over transactions with a flow similar to synchronous execution.

📋 Changes Overview

• Added a Transaction clause to manage transactional operations.
• Introduced a beginTransaction() method to start a new transaction context.
• Added support for adding queries to the transaction using a unique name and query type (SELECT, INSERT, UPDATE, or DELETE).
• Each query can also include a callback (closure) to handle the result.
• After all queries are added, the compile() method executes them in sequence and handles their results.
• If all queries execute successfully, the transaction is automatically committed, and the result of the last query is returned.
• Queries are executed synchronously to ensure proper transaction control.

📦 Query Result Access

• Query results are stored in a QueryResultCollection class.
• The collection is injected into each query’s callback, allowing access to the results of all previous queries within the transaction.