Vendor dompurify, use isomorphic-dompurify only for tests

scripts/shared/run.ts

@@ -0,0 +1,8 @@
+import * as child_process from "child_process";
+import chalk from "chalk";
+
+export function run(command: string, options?: { cwd: string }) {
+    console.log(chalk.grey(`$ ${command}`));
+
+    child_process.execSync(command, { stdio: "inherit", ...options });
+}