[feature] Support for Wago connectors

[gioele]

Wago connectors are a common kind of splicing connectors, a modern alternative to twist-on wire connectors.

Differently from in-line splicing connectors (see feature request #26), wires in Wago connectors are all on the same side of the connector. It would be nice if this important property could be carried over in the graphical representation.

[aakatz3]

To add onto this, Wire Nuts (common in USA installations) behave relatively similarly, and can likely be implemented at the same time.

[kvid]

@aakatz3 The Wire Nut have all the wires connected in the same "hole" and can probably use the existing ferrule/splice with all wires connected from one side. @formatc1702 should have this in mind when he plan to rename the connector category value as mentioned in issue #26 (comment)

[formatc1702]

Like @kvid mentioned, both wire nuts and Wago 221 series connectors behave very much like a splice, electrically speaking. Thus, they should be represented as such in WireViz.

wires in Wago connectors are all on the same side of the connector. It would be nice if this important property could be carried over in the graphical representation.

For a functional representation of the wiring (which is what WireViz is for), this is irrelevant, and also hard to implement in the current code.

See example 05:

X1, X2 and X3 are all the same type of connector, but X2 has wires coming out both sides of each pin due to the daisy chaining. That doesn't mean it suddenly has more pins.

If the orientation is really important, I guess it could be achieved defining the Wago as a connector, and making sure it is to the left/right of all connecting elements, a little like example 06, if you imagine X2, X4 and X6 to be the Wagos.

I will therefore close this issue and refer to #26 for now.

[formatc1702]

As a bonus, here's how the image in the first comment might be rendered in WireViz:
(PE rendered as green, since multicolored wires are still in the works)

I realize the text to generate the connections is not very compact, this is an issue that could be addressed in the future (#67).

cables:
  C1: &cable
    type: Mains cable
    colors: [BN, BU, GN] # GN to be replaced with GNYE for PE
    gauge: 1.5
  C2:
    <<: *cable
  C3:
    <<: *cable

connectors:
  S1: &wago
    category: ferrule
    manufacturer: Wago
    manufacturer_part_number: 221-413
    color: OG
  S2:
    <<: *wago
  S3:
    <<: *wago

connections:
  -
    - C1: 1
    - S1
  -
    - C1: 2
    - S2
  -
    - C1: 3
    - S3:
  -
    - C2: 1
    - S1
  -
    - C2: 2
    - S2
  -
    - C2: 3
    - S3
  -
    - S1
    - C3: 1
  -
    - S2
    - C3: 2
  -
    - S3
    - C3: 3