FINERACT-2246: New command processing - document management

[vidakovic]

Description

Major improvement of document management. Non of the core structures are located outside of "fineract-document" (almost standalone). Major performance improvement due to true streaming of documents (no byte array loading into memory... unless we deal with base64 encoded data). Content is now streamed asynchronously. Document management was actually not using the command concept at all. All document and image operations were not showing up in any audit logs. Everything is now migrated to the new command processing. Applied a technique to remove direct dependencies to staff and client packages.

Checklist

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[IOhacker]

@vidakovic seems that there are some conflicts

[vidakovic]

It's actually only one thing left: the bulk import test cases try to retrieve the uploaded documents from the local file system... Which is different when you run your tests locally, in a docker Container or on GitHub actions