Style Rendering: Enable parallel line rendering

[josephbirkner]

To enable parallel line rendering, e.g. one solid plus one dashed line, we need rules with inclusive sub-rules and miter-offset. E.g. such a rule could look like this:

- type: Lane
  geometry: ["line"]
  all-of:  # new `all-of` as an alternative to `first-of`
  - color: red
    lateral-offset: 0.3  # Miter-based lateral shift
  - color: blue
    dashed: true
    offset: [-0.3, 0, 0]  # alternative to lateral-offset
    offset-type: miter    # 

Note: all-of and first-of shall be nestable to any oder/depth.

E.g.:

# Lane Boundary in natural style
  - type: .*_LaneGroup_Boundary_Parallel_Sequential
    filter: "showLaneBoundariesNatural == true"
    geometry: [line]
    first-of:
      - geometry: line
        filter: properties.type == 'LONG_DASHED_LINE'
        color: white
        dashed: true
        dash-length: 10
        opacity: 0.9
        width: 1.5  
      - geometry: line
        filter: properties.type == 'SINGLE_SOLID_LINE'
        color: white
        opacity: 0.9
        width: 1.5 
      - geometry: line
        filter: properties.type == 'SOLID_LINE_DASHED_LINE'
        all-of:
          - color: white
            lateral-offset: 2
            opacity: 0.9
            width: 1.5
          - color: white
            dashed: true
            opacity: 0.9
            width: 1.5   
            selectable: false