Add Tests and Coverage Reporting

[rezabekf]

This PR improves test coverage and adds coverage reporting to the project.

Changes

1. Unit Tests:

   • Added tests for the ami_id function using moto to mock AWS services.
   • Added tests for the FSx create function using unittest.mock.patch (since FSx is not supported in moto).

2. Coverage Reporting:

   • Configured pytest.ini for coverage reporting on the src directory.

3. CI/CD Pipeline:

   • Updated to run tests and report coverage.

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