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- [dwd] Integrate DWD GRIB Downloader as ``gribmagic dwd acquire`` subcommand
- [dwd] Add command to install the DWD GRIB Downloader at runtime:
``gribmagic install dwd-grib-downloader``.
- [dwd] Accept ``gribmagic dwd acquire`` without ``--timestamp`` parameter.
When the timestamp is omitted, the most recent available modelrun is used.
- [tool] Add subcommand ``gribmagic smith bbox``, in order to extract an area of
interest from GRIB files using a bounding box, or a two-letter country code.
- [tool] Add subcommand ``gribmagic smith regrid``, in order to transform DWD ICON's
icosahedral-gridded files into regular grids in ``long1`` format.