refactor: expose api for loading demo project

apps/client/src/common/api/db.ts

@@ -112,6 +112,14 @@ export async function loadProject(filename: string): Promise<MessageResponse> {
   return res.data;
 }
 
+/**
+ * HTTP request to load the demo project file
+ */
+export async function loadDemo(): Promise<MessageResponse> {
+  const res = await axios.post(`${dbPath}/demo`);
+  return res.data;
+}
+
 /**
  * HTTP request to duplicate a project file
  */