Enhancement and Optimization of smart contract

[Raja543]

Hello , Myself Raja Kumar , a proud contributor at GSSOC23. I would like to contribute to this project.

### Optimization 1. Use uint256 instead of uint .

2. Consider using a mapping instead of an array If you anticipate a large number of deployed Sal contracts, using a mapping instead of an array for deployedSal in the allemp contract can provide better efficiency for contract retrieval and management.

3. Consider using bytes32 for string parameters If the string parameters have a fixed length, such as _FirstName, _LastName, _Country, _Position, and _image, use the bytes32 data type instead of string. This can save gas costs and improve efficiency.

4.Consider using bytes32 for string parameters
If the string parameters have a fixed length, such as _FirstName, _LastName, _Country, _Position, and _image, you can use the bytes32 data type instead of string. This can save gas costs and improve efficiency.

5.Consider using a modifier for access control If certain functions should only be accessible by specific roles or addresses, you can use a modifier to enforce access control. This helps improve security and restrict unauthorized access to critical functions.