NOISSUE - Add cli tests

[SammyOina]

What type of PR is this?

What does this do?

• New Features

  • Enhanced command output for attestation and checksum commands, providing clearer user feedback during execution.
  • Introduced new unit tests for attestation commands, CA bundle commands, and key management, ensuring reliability and correctness.

• Bug Fixes

  • Improved error handling for command executions, allowing for graceful exits instead of abrupt terminations.

• Documentation

  • Updated command descriptions and usage examples to better guide users in utilizing the CLI functionalities.

Which issue(s) does this PR fix/relate to?

• Related Issue #159

Have you included tests for your changes?

Did you document any new/modified feature?

Notes

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 46.66667% with 8 lines in your changes missing coverage. Please review.

Project coverage is 26.33%. Comparing base (3d9fde3) to head (5eba373). Report is 6 commits behind head on main.

Files with missing lines	Patch %	Lines
cli/attestation.go	20.00%	8 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #274 +/- ## ========================================== + Coverage 18.83% 26.33% +7.49% ========================================== Files 76 76 Lines 5213 5218 +5 ========================================== + Hits 982 1374 +392 + Misses 4057 3612 -445 - Partials 174 232 +58 ```

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