* feat: add support for MXF format in media handling
* Updated supported formats documentation to include MXF.
* Added MXF to valid video extensions in tests.
* Registered MXF MIME type in mime-types utility.
* fix: enhance MXF handling in mime-types utility
* Updated video mime type validation to include 'application/mxf'.
* Adjusted asset type determination to recognize MXF as a video container.
* chore: clean up
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Co-authored-by: Jason Rasmussen <jason@rasm.me>