Add MSSQL Support to Doppar PHP Framework #274

Description

Currently, the Doppar PHP framework supports the following databases:

• MySQL
• PostgreSQL (pgsql)
• SQLite

However, there is no support for Microsoft SQL Server (MSSQL). This limits the framework's usability in environments where MSSQL is required.

Why this matters

MSSQL is widely used in enterprise environments, especially in Microsoft-based ecosystems. Adding MSSQL support would:

• Broaden the adoption of Doppar
• Increase flexibility for developers
• Enable integration with existing enterprise systems