Merge GET /processes and GET /processes/{process_id}?

[m-mohr]

During development of the clients I found it very inconvenient that you need to call GET /processes/{process_id} for all processes over and over again. I'd suggest to merge both endpoints, which basically adds the args only:

Example for /processes:

[
  {
    "process_id":"NDVI",
    "description":"Computes the normalized difference vegetation index (NDVI) for all pixels of the input dataset.",
    "args":{
      "red":{
        "description":"red band ..."
      },
      "nir":{
        "description":"near infrared band ..."
      }
    }
  },
  {
    "process_id":"median_time",
    "description":"Applies median aggregation to pixel time series for all bands of the input dataset.",
    "args":{
      "A":{
        "description":"input product (time series)"
      }
    }
  }
]

GET /processes/{process_id} would be removed completely.

Not sure about GET /data and GET /data/{product_id}. The latter delivers more additional information to /data and I think datasets are not requested that often as only one or two datasets are usually used per request, but more than one or two processes per request.

[m-mohr]

Merging processes would depend on how extensive #47 will be.
Merging data depends on the introduction of STAC (#64).