Show teams in the workflow mermaid graph

mac/Sources/Byre/Workflow.swift

@@ -15,12 +15,19 @@ private let stateColors: [RunStage.StatePayload: NodeColors] = [
     .discarded: NodeColors(fill: Palette.dangerTint, stroke: Palette.danger, text: Palette.text),
 ]
 
+private func stageSteps(_ steps: [WorkflowStep]) -> [WorkflowStep] {
+    steps.flatMap { s in s.order.map(stageSteps) ?? s.parallel.map(stageSteps) ?? [s] }
+}
+
 private func stageGraph(_ run: WorkflowRun) -> Flowchart {
     var chart = Flowchart(direction: .td)
+    let steps = Dictionary(stageSteps(run.definition.steps).map { ($0.stage ?? "", $0) }, uniquingKeysWith: { a, _ in a })
     for (i, s) in run.stages.enumerated() {
         let id = "s\(i)"
+        let colors = stateColors[s.state]!
         chart.node(id, label: s.name, shape: .box)
-        chart.nodes[id]!.style = stateColors[s.state]!
+        chart.nodes[id]!.style = colors
+        chart.nodes[id]!.members = teamNodes(id, steps[s.name]?.agents, stroke: colors.stroke)
     }
     let ids = Dictionary(run.stages.enumerated().map { ($0.element.name, "s\($0.offset)") }, uniquingKeysWith: { a, _ in a })
     for s in run.stages {