Support JSON input

For the Galaxy tool wrapper, it would simplify the call a bit if JSON would be supported.

At the moment the JSON generated by Galaxy looks like this (I guess some postprocessing will be necessary anyway):

{"methods_repeat": [{"module_cond": {"method_cond": {"field": "SM2", "min": 10.0, "max": 60.0, "flag": 255.0, "method_select": "flagRange"}, "module_select": "outliers"}}, {"module_cond": {"method_cond": {"field": "SM2", "window_cond": {"window_select": "none"}, "z": 3.5, "min_residuals": null, "min_periods": null, "center": false, "flag": 255.0, "method_select": "flagMAD"}, "module_select": "outliers"}}, {"module_cond": {"method_cond": {"field": "SM2", "path": "test", "max_gap": null, "history_cond": {"history": "valid", "history_select": "valid"}, "phaseplot": null, "dfilter": Infinity, "method_select": "plot"}, "module_select": "tools"}}]}

This issue also once arose in the extractor from time-series-management project [1]. Also we should have a look into #296 and #378 (closed) which are possibly tightly connected.

[1] https://codebase.helmholtz.cloud/ufz-tsm/tsm-extractor

i could imagine a json saqc configuration, which then will probably look something like this:

{
  "test": [
    {"varname": "foo", "function": "flagRange", "kwargs": {"min": 1100}},
    {"varname": "bar", "function": "flagMAD", "kwargs": {"window": "1H", "center": true}},
    {"varname": "baz", "function": "flagRange", "kwargs": {"min": 0, "max": 990, "flag": 99}}
  ]
}

mentioned in merge request !717 (merged)

fixed by !717 (merged), will come with the next major release

closed