Added mime enhancement for file type with same extension but different content type

[ArghyadeepM]

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Description This is a enhancement of validating the image/pdf files listed as part of white list categorise to actually validate the content-type associated with it.

Sometimes, a invalid file can be uploaded even though the extension passes the white list extensions.

References

QA-test:

Jira-link:

Artifact URL:

[CLAassistant]

All committers have signed the CLA.

[mvktsk]

Review task https://virtocommerce.atlassian.net/browse/VP-7852 has been created

[OlegoO]

To implement this functionality:

1. Develop a custom module tailored to your specific requirements.
2. Utilize the BlobCreatedEvent subscription mechanism. Added in https://github.com/VirtoCommerce/vc-module-assets/pull/19.
3. Enhance the implementation by incorporating validation checks to ensure that the content type aligns with the expected content, thereby throwing exceptions as necessary to handle mismatches.