[PROPOSAL] Switch case mask

[adrienaury]

Actual

  - selector:
      jsonpath: "client_type1"
    mask:
        hashInCSV:
           uri: "file://../referentiels/type1.csv"

  - selector:
      jsonpath: "client_type2"
    mask:
        hashInCSV:
           uri: "file://../referentiels/type2.csv"

  - selector:
      jsonpath: "client"
    mask:
      template: '{{if eq .type_client 1}}{{.client_type1}}{{else}}{{.client_type2}}{{end}}'

Wanted

  - selector:
      jsonpath: "client"
    mask:
      switch:
        - case: '{{eq .type_client 1}}'  # required
          mask:  # one of mask / masks
            hashInCSV:
              uri: "file://../referentiels/type1.csv"
        default:    # required
          mask:
            hashInCSV:
              uri: "file://../referentiels/type2.csv"