[WIP] Vancouver polys demo

[asinghvi17]

This is used as a benchmark for GEOS so I figured we should get in the game as well.

The branch is based off my PolygonContents PR, but still fails with a polynode indexing error?

ERROR: BoundsError: attempt to access 71-element Vector{GeometryOps.PolyNode{Float64}} at index [0]
Stacktrace:
  [1] getindex
    @ ./essentials.jl:13 [inlined]
  [2] _flag_ent_exit!(::Type{…}, ::GeoInterface.LinearRingTrait, poly::GeoInterface.Wrappers.LinearRing{…}, pt_list::Vector{…}, delay_cross_f::typeof(GeometryOps._union_delay_cross_f), delay_bounce_f::Base.Fix2{…}; exact::GeometryOps._True)
    @ GeometryOps ~/.julia/dev/GeometryOps/src/methods/clipping/clipping_processor.jl:463
  [3] _flag_ent_exit!
    @ ~/.julia/dev/GeometryOps/src/methods/clipping/clipping_processor.jl:448 [inlined]
  [4] _build_ab_list(::Type{…}, poly_a::GeoInterface.Wrappers.LinearRing{…}, poly_b::GeoInterface.Wrappers.LinearRing{…}, delay_cross_f::typeof(GeometryOps._union_delay_cross_f), delay_bounce_f::typeof(GeometryOps._union_delay_bounce_f); exact::GeometryOps._True)
    @ GeometryOps ~/.julia/dev/GeometryOps/src/methods/clipping/clipping_processor.jl:61
  [5] _build_ab_list
    @ ~/.julia/dev/GeometryOps/src/methods/clipping/clipping_processor.jl:51 [inlined]
  [6] _union(::GeometryOps.TraitTarget{…}, ::Type{…}, ::GeoInterface.PolygonTrait, poly_a::GeoInterface.Wrappers.Polygon{…}, ::GeoInterface.PolygonTrait, poly_b::GeoInterface.Wrappers.Polygon{…}; exact::GeometryOps._True, kwargs::@Kwargs{})
    @ GeometryOps ~/.julia/dev/GeometryOps/src/methods/clipping/union.jl:57
  [7] _union
    @ ~/.julia/dev/GeometryOps/src/methods/clipping/union.jl:47 [inlined]
  [8] #union#168
    @ ~/.julia/dev/GeometryOps/src/methods/clipping/union.jl:38 [inlined]
  [9] union
    @ ~/.julia/dev/GeometryOps/src/methods/clipping/union.jl:35 [inlined]
 [10] _union(target::GeometryOps.TraitTarget{…}, ::Type{…}, ::GeoInterface.PolygonTrait, poly_a::GeoInterface.Wrappers.Polygon{…}, ::GeoInterface.MultiPolygonTrait, multipoly_b::GeoInterface.Wrappers.MultiPolygon{…}; fix_multipoly::Nothing, kwargs::@Kwargs{…})
    @ GeometryOps ~/.julia/dev/GeometryOps/src/methods/clipping/union.jl:224
 [11] union(geom_a::GeoInterface.Wrappers.Polygon{…}, geom_b::GeoInterface.Wrappers.MultiPolygon{…}, ::Type{…}; target::GeometryOps.TraitTarget{…}, kwargs::@Kwargs{…})
    @ GeometryOps ~/.julia/dev/GeometryOps/src/methods/clipping/union.jl:38

[asinghvi17]

Clipping tracing hit every point - clipping error. Please open an issue with polygons: [[[891106.625, 639648.8750000037], [891103.0629999993, 639693.0000000084], [891110.8749999995, 639725.8129999982], [891171.9379999998, 639788.3750000019], [891244.5000000002, 639837.4380000001], [891342.8749999995, 639873.5000000019], [891293.813, 639909.5629999992], [891218.6879999987, 639954.8130000001], [891176.8750000002, 639993.625], [891169.6879999992, 640091.063000002], [891200.2499999991, 640176.9379999992], [891274.1879999994, 640286.0629999964], [891362.0000000007, 640373.6879999992], [891438.8749999993, 640404.4999999972], [891496.0000000002, 640413.1250000019], [891567.25, 640406.1879999992], [891628.5000000009, 640376.563000001], [891768.3750000005, 640352.7499999944], [891935.0629999988, 640363.8750000019], [891994.5629999989, 640363.3750000028], [892129.6879999997, 640349.7500000028], [892269.5629999998, 640325.8750000056], [892369.4379999992, 640325.7500000009], [892476.8129999997, 640341.3750000009], [892558.5629999989, 640371.9999999981], [892630.3129999992, 640390.0630000001], [892725.75, 640403.1879999992], [892859.6879999996, 640430.688000002], [892981.8130000001, 640463.6880000001], [893108.0629999992, 640470.5000000009], [893234.2499999995, 640477.1880000001], [893339.9379999992, 640470.8749999991], [893348.9379999993, 640398.3750000037], [893434.6249999991, 640299.5629999964], [893466.3750000002, 640235.1880000001], [893492.6249999992, 640137.8750000019], [893548.6879999986, 639992.1879999964], [893561.6250000005, 639940.625], [893546.4379999989, 639800.9999999944], [893525.1879999992, 639702.625], [893510.0629999986, 639672.1879999973], [893512.7500000005, 639583.9379999992], [893583.8749999992, 639469.8130000001], [893651.1879999997, 639399.875], [893736.7500000005, 639303.0629999982], [893788.6879999996, 639182.6879999992], [893824.3749999992, 639083.0000000019], [893876.5629999985, 638977.625], [893903.4999999995, 638903.3750000019], [893904.1249999997, 638834.2500000019], [893891.8129999994, 638717.4379999973], [893871.7499999992, 638573.0629999964], [893876.7499999994, 638483.6880000038], [893873.749999999, 638385.6249999916], [893862.1879999998, 638354.0630000057], [893844.3749999998, 638306.6250000028], [893828.0629999987, 638223.188000001], [893832.1250000002, 638193.0000000009], [893808.3750000009, 638185.9380000001], [893755.125, 638149.0000000028], [893689.1879999998, 638071.6879999982], [893654.1249999994, 637998.9999999991], [893601.1249999995, 637965.1250000065], [893537.1250000005, 637966.7500000019], [893499.438, 637980.3129999964], [893408.3749999997, 638043.2499999916], [893314.4379999994, 638086.2500000009], [893205.8750000003, 638109.688000001], [893117.9999999993, 638111.375], [892998.5000000007, 638074.3130000038], [892802.5000000006, 638017.3130000038], [892640.3749999993, 637990.9999999935], [892562.3749999999, 638001.188000001], [892475.4379999989, 638040.9379999973], [892367.9379999987, 638107.4999999972], [892277.6879999987, 638206.4380000001], [892245.4999999998, 638247.8750000028], [892220.6250000002, 638348.063000002], [892214.5629999989, 638394.4380000047], [892212.5000000006, 638411.4999999981], [892125.5629999986, 638577.4379999982], [892061.187999999, 638676.2499999981], [892021.3750000006, 638702.0000000009], [891959.8749999994, 638714.5629999973], [891936.1879999988, 638722.5629999992], [891927.0629999989, 638740.0000000056], [891930.2500000007, 638775.875], [892003.5629999995, 638855.0630000001], [892076.3749999992, 638912.0629999982], [892108.6879999988, 638966.9379999982], [892120.5000000008, 639063.688000001], [892103.1879999996, 639135.563000002], [892070.6250000007, 639168.9379999992], [891986.1249999995, 639211.5], [891890.1250000003, 639280.5629999992], [891813.3129999985, 639350.9379999982], [891748

but unfortunately the log cuts out here. I'll try to run this locally at some point to get the full log...