Added CMR Validation

[binni979]

This is a PR to solve this issue.

Description:
The CMR Team recommended that pyQuARC use the CMR API for basic validation checks (metadata schema, controlled vocabulary) rather than having a separate validation. If CMR validation changes, they want to ensure that users are not using outdated validation in pyQuARC. They also want to verify consistency between what results are provided to users in pyQuARC and CMR.

Steps Implemented

1. _validate_with_cmr function: Validates the collection using the CMR API.
2. add_cmr_response function: Categorizes API responses as warnings or errors.
3. Integrated these functions into main.py:

• Validates collections via the API.
• Appends API response errors as cmr_errors and warnings as cmr_warnings in the output of the error.