Bulk forcing options - XBeach

[benjaminleighton]

To support ROAM worflows users must be able to specify "bulk" forcing for both xbeach and swan. The ROAM interface facilitates this by allowing users to specify Wave: timestamp, sig_wav_ht, mn_wav_dir, mn_wav_per and Wind: timestamp, wind_speed, wind_dir

For xbeach specifically rompy needs to:
Creates XBEACH control file
Creates XBEACH forcing files from global or user specified “bulk” forcing
Bathy: bathy.txt: depth at each grid point
Waves: jonswap1.inp: wave height, wave period, wave direction, 3.3, 10.0, duration, 2.0
Wind: wind.txt: timestamp, speed, direction
Water level: zs0input.txt: sampled from tpx tides at grid centre: timestamp, water level