Fix/ LateInitializationError: Field 'prefs' has not been initialized.

[ghassenbenzahra123]

📝 Summary

This PR fixes #1372

Description

Make sure to initialize shared prefs before calling fetchmosque in mosqueManager.

Checklist:

• Coding Standards: I have reviewed my code to ensure it follows the project's coding standards.
• Testing: I have tested the changes and they work as expected.
• Merge Conflicts: I have resolved any merge conflicts with the latest main/development branch.
• Branch Status: The branch is up-to-date with the target branch (main/development).

[YassinNouh21]

@ghassenbenzahra123
it is called from the Api.dart not the mosque_manager.dart. it is correct that it happens at the msoque_manager.dart but even though the cause error is at Api.dart