Wind_file format for 1D (documentation)

[GlennStrypsteen]

I had some issues (unrealistic erosion) with using the standard nautical wind file when doing some 1D simulations in Aeolis V3. It should be documented that the wind file for 1D is different than for 2D. In 2D simulations we can use the nautical wind direction with the use of alfa to correct for coastal orientation. In 1D simulations it is better to use the cartesian wind direction by transforming the nautical wind input to cross-shore components (cartesian) with 0 deg meaning onshore and 180 offshore. The longshore component is not needed in 1D. This should be documented somewhere.