Add Canada's HRDPS model

[blaylockbk]

Working on #207

This data isn't as straightforward as others products, so it does take a fair amount of "insider knowledge" to use Herbie to get this data.

Note: HRDPS is only available for the last 24 hours; I don't know if the data is archived anywhere it is accessible.

See the notebook for examples

[blaylockbk]

Working on this, I've run into some issues that need to be addressed.

• Determine list of valid variable and level arguments and tell user what those are if they didn't supply the right data.
• Metpy can't handle the "rotated_longitude_latitude" grid projection. Maybe open an issue with MetPy. (see metpy/plots/mapping.py >> Unhandled projection: rotated_latitude_longitude Unidata/MetPy#3099)

  crs = ccrs.RotatedPole(
    pole_latitude=ds.gribfile_projection.grid_north_pole_latitude,
    pole_longitude=ds.gribfile_projection.grid_north_pole_longitude,
  )

• H.inventory() needs to parse the local data correctly.
• Add the "North" experimental domain.