docs(docs-infra): Remove leading path from zipped files. (#59726)

In certain circonstances, a leading slash in the file paths created a incorrect unarchived project.

fixes #57075

PR Close #59726

adev/shared-docs/utils/zip.utils.ts

@@ -14,6 +14,9 @@ import {zip, strToU8} from 'fflate';
 export async function generateZip(files: FileAndContent[]): Promise<Uint8Array> {
   const filesObj: Record<string, Uint8Array> = {};
   files.forEach(({path, content}) => {
+    if (path.startsWith('/')) {
+      path = path.slice(1);
+    }
     filesObj[path] = typeof content === 'string' ? strToU8(content) : content;
   });