[Feature] Allow referencing a cable's/bundle's wires by color or label, if unambiguous

[formatc1702]

Similar to how a connector's pins can be referenced by its ID (as per its entry in pins), or by its label (as per its entry in pinlabels) in case the label is unambiguous, a cable's/bundle's wire needs the ability to be referenced by its color (if unambiguous) since that is often the most natural way for the user. Additionally, cables should have a wirelabels attribute analogous to a connector's pinlabels, that can also be used for referencing.

Example 08's connection set should therefore work with either of the following:

• Using the wire numbers (currently the only way):

  connections:
    -
      - Key: [S,R,T]
      - W1: [1,2,3]

• Using the wire colors:

  connections:
    -
      - Key: [S,R,T]
      - W1: [WH, BN, GN]

• Using the new wirelabels attribute:

  ...
  
  cables:
    W1:
      color_code: DIN
      wirecount: 3
      wirelabels: [one, two, three]
      ...
  
  connections:
    -
      - Key: [S,R,T]
      - W1: [one, two, three]

[formatc1702]

This is an expansion of #169 and there was a suggestion of using #, $ or similar to distinguish between sequential numbers, labels, etc.. but I can't seem to find it.

[kvid]

This is an expansion of #169 and there was a suggestion of using #, $ or similar to distinguish between sequential numbers, labels, etc.. but I can't seem to find it.

I did suggest these prefixes in #10 (comment) (almost 5 months ago).

[formatc1702]

Thanks, searching for # and $ within GitHub did not work, and it didn't help that the comment was in an already merged PR.

I'm happy to discuss this feature as a new issue/PR, feel free to open one; I already have some thoughts on the matter.

For the time being, #194 would close this issue ignoring the above mentioned feature.