Add set project scheduler command and update scene document to include scheduler

src/commands/set-project-scheduler-command.ts

@@ -0,0 +1,49 @@
+import { createOpaqueId } from "../core/ids";
+import {
+  cloneProjectScheduler,
+  type ProjectScheduler
+} from "../scheduler/project-scheduler";
+
+import type { EditorCommand } from "./command";
+
+interface SetProjectSchedulerCommandOptions {
+  label: string;
+  scheduler: ProjectScheduler;
+}
+
+export function createSetProjectSchedulerCommand(
+  options: SetProjectSchedulerCommandOptions
+): EditorCommand {
+  const nextScheduler = cloneProjectScheduler(options.scheduler);
+  let previousScheduler: ProjectScheduler | null = null;
+
+  return {
+    id: createOpaqueId("command"),
+    label: options.label,
+    execute(context) {
+      const currentProjectDocument = context.getProjectDocument();
+
+      if (previousScheduler === null) {
+        previousScheduler = cloneProjectScheduler(
+          currentProjectDocument.scheduler
+        );
+      }
+
+      context.setProjectDocument({
+        ...currentProjectDocument,
+        scheduler: cloneProjectScheduler(nextScheduler)
+      });
+    },
+    undo(context) {
+      if (previousScheduler === null) {
+        return;
+      }
+
+      const currentProjectDocument = context.getProjectDocument();
+      context.setProjectDocument({
+        ...currentProjectDocument,
+        scheduler: cloneProjectScheduler(previousScheduler)
+      });
+    }
+  };
+}