Wrote new tests for the following packages in the cmd package:
- completion
- config
* In addition to tests, updated the code for the `stringKeysToSlice`
to return the final string slice in sorted order of keys.
Added new MockIKubescape struct in the core/mocks package
Signed-off-by: VaibhavMalik4187 <vaibhavmalik2018@gmail.com>
