Add set project name command

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

@@ -0,0 +1,37 @@
+import { createOpaqueId } from "../core/ids";
+import { DEFAULT_PROJECT_NAME } from "../document/scene-document";
+
+import type { EditorCommand } from "./command";
+
+export function createSetProjectNameCommand(nextName: string): EditorCommand {
+  const normalizedName = nextName.trim() || DEFAULT_PROJECT_NAME;
+  let previousName: string | null = null;
+
+  return {
+    id: createOpaqueId("command"),
+    label: `Rename project to ${normalizedName}`,
+    execute(context) {
+      const currentProjectDocument = context.getProjectDocument();
+
+      if (previousName === null) {
+        previousName = currentProjectDocument.name;
+      }
+
+      context.setProjectDocument({
+        ...currentProjectDocument,
+        name: normalizedName
+      });
+    },
+    undo(context) {
+      if (previousName === null) {
+        return;
+      }
+
+      const currentProjectDocument = context.getProjectDocument();
+      context.setProjectDocument({
+        ...currentProjectDocument,
+        name: previousName
+      });
+    }
+  };
+}