[Feature] Create a parent MediaStorage entity with common metadata

[obulat]

Problem Description

Currently, the catalog only has data for images. To add audio, we need to create the Storage class for audio. The first step for this is extracting common media metadata from ImageStore class to MediaStore class. This MediaStore class will be the base for other media types in the future.

Solution Description

The solution would be to extract the common columns that would be used for any media type into an abstract base class, MediaStore. This class would handle data cleaning and saving the buffer to the disk. The add_item method for cleaning and storing the media items would be implemented in the child classes: ImageStore, AudioStore, etc, as they have some logic specific to the media type.

Alternatives

An alternative could be to create a completely separate AudioStore class. This would be problematic as it would make us have duplicate code.

Additional context