Refactor ElkSharp hybrid routing and document speed path

src/__Libraries/StellaOps.ElkSharp/ElkEdgeRouterIterative.Finalization.HybridBaseline.cs

@@ -0,0 +1,49 @@
+namespace StellaOps.ElkSharp;
+
+internal static partial class ElkEdgeRouterIterative
+{
+    private static ElkRoutedEdge[] ApplyLeanHybridBaselinePostProcessing(
+        ElkRoutedEdge[] edges,
+        ElkPositionedNode[] nodes,
+        ElkLayoutOptions layoutOptions)
+    {
+        var result = ElkEdgePostProcessor.AvoidNodeCrossings(edges, nodes, layoutOptions.Direction);
+        result = ElkEdgePostProcessor.EliminateDiagonalSegments(result, nodes);
+        result = ElkEdgePostProcessorSimplify.SimplifyEdgePaths(result, nodes);
+        result = ElkEdgePostProcessorSimplify.TightenOuterCorridors(result, nodes);
+        if (HighwayProcessingEnabled)
+        {
+            result = ElkEdgeRouterHighway.BreakShortHighways(result, nodes);
+        }
+
+        var serviceNodes = nodes.Where(n => n.Kind is not "Start" and not "End").ToArray();
+        var minLineClearance = serviceNodes.Length > 0
+            ? Math.Min(serviceNodes.Average(n => n.Width), serviceNodes.Average(n => n.Height)) / 2d
+            : 50d;
+
+        result = ElkEdgePostProcessor.NormalizeBoundaryAngles(result, nodes);
+        result = ElkEdgePostProcessor.NormalizeSourceExitAngles(result, nodes);
+        result = ElkEdgePostProcessor.SpreadSourceDepartureJoins(result, nodes, minLineClearance);
+        result = ElkEdgePostProcessor.RepairBoundaryAnglesAndTargetApproaches(result, nodes, minLineClearance);
+        result = RestoreProtectedRepeatCollectorCorridors(result, edges, nodes);
+        result = ApplyHybridTerminalRuleCleanupRound(
+            result,
+            nodes,
+            layoutOptions.Direction,
+            minLineClearance);
+        result = ChoosePreferredBoundarySlotRepairLayout(
+            result,
+            ApplyPostSlotDetourClosure(result, nodes, minLineClearance),
+            nodes);
+        result = ChoosePreferredBoundarySlotRepairLayout(
+            result,
+            ElkEdgePostProcessor.SnapBoundarySlotAssignments(
+                result,
+                nodes,
+                minLineClearance,
+                enforceAllNodeEndpoints: true),
+            nodes);
+
+        return result;
+    }
+}