Vendor dompurify, use isomorphic-dompurify only for tests

scripts/build-storybook.ts

@@ -1,10 +1,4 @@
-import * as child_process from "child_process";
+import { run } from "./shared/run";
 
 run("yarn build");
 run("npx build-storybook");
-
-function run(command: string, options?: { env?: NodeJS.ProcessEnv }) {
-    console.log(`$ ${command}`);
-
-    child_process.execSync(command, { stdio: "inherit", ...options });
-}