Enh/ecad wind indices

[bzah]

Pull Request is related to #204

• Unit tests cover the changes.
• These changes were tested on real data.
• The relevant documentation has been added or updated.
• A short description of the changes has been added to doc/source/references/release_notes.rst.

Describe the changes you made

Add ECAD wind indices.

Notes

1. The definition used for DDnorth in icclim is different from the one from ECAD ATBD v11[0].
   It seems the ATBD wrongly assumes that DD can be below 0 degree in DDnorth but that should not be possible.
   According to both chapter 3 of the ATBD [0] and ERA5 documentation [1] DD is bounded by [0, 360] degree.

2. DDsouth definition is unclear in the ATBD.
   In icclim we assume DDsouth is (135° < DD <= 225°) and not (225° < DD <= 315°)

[0] https://knmi-ecad-assets-prd.s3.amazonaws.com/documents/atbd.pdf
[1] https://confluence.ecmwf.int/pages/viewpage.action?pageId=133262398

[github-actions]

Report

File	Stmts	Miss	Cover	Missing
icclim
icclim_exceptions.py	7	1	86%	20
icclim_logger.py	85	29	66%	24, 43, 65, 70–95, 105, 111–142, 150–155
main.py	270	20	93%	119, 128, 403, 488, 514–515, 517–518, 520, 522–523, 525–526, 545–552, 689, 696, 700
utils.py	29	1	97%	20
icclim/generic_indices
generic_indicators.py	469	84	82%	57, 60, 77, 81, 85, 98, 104, 178, 217, 224, 355, 384, 666, 697, 703, 711, 730, 808, 828–834, 838, 868, 870, 935–936, 969–996, 1023–1044, 1060, 1069–1070, 1076–1106, 1112–1116, 1140
standard_variable.py	46	1	98%	19
threshold.py	398	21	95%	198, 225, 229, 277, 292–295, 310, 317, 393, 529, 598, 692, 895, 917, 923, 997, 1000, 1098–1100
icclim/models
cf_calendar.py	35	1	97%	20
climate_variable.py	96	10	90%	102, 146, 157, 191, 197, 235, 239, 267–268, 305
frequency.py	176	11	94%	167–170, 314–316, 323, 401, 427, 432
index_group.py	34	1	97%	33
operator.py	29	1	97%	14
standard_index.py	28	2	93%	59, 63
icclim/pre_processing
input_parsing.py	178	33	81%	41, 105, 110, 116, 125, 138, 167, 183, 197, 217, 225, 227, 236, 245, 263, 277–285, 294–309, 331
rechunk.py	86	2	98%	38, 132
TOTAL	2417	218	91%

Test results

Tests	Skipped	Failures	Errors	Time
185	0 💤	0 ❌	0 🔥	2m 2s ⏱️