Adding support for Mara Storage

[leo-schick]

The implementation of the storage module from @ice1e0 has been merged into the master branch. I see this as a breaking change and suggest to publish this therefore in the next major version 4.

In addition I think some additional commands should be added for working with files. Here some samples:

• WriteFile - Write an SQL Output to a file on a blob storage
• CopyFile - copies a file from one location to another
• RemoveFile - removes a file from a blob storage

optional additional commands:

• ValidateFile - check if a file is of a specific format and validates the file against a Schema file (XSD or a JSON Schema file)
• ConvertFile - converts a file from one file format to another, e.g. xml to json

[ice1e0]

Its fine for me. There wasn't much contribution so I decided to merge it to master.

[leo-schick]

I digged a bit into it and I think the mara storage/pipeline module should support path configuration from fsspec. Maybe then supporting storages via the URL without specifically mentioning the storage_alias as other tools like pandas does it.