fix: prevent SvelteMarkdown from ssr

prevent repo page from server side rendering

SvelteMarkdown component causes a 500 error when rendered on server
with sveltekit

src/routes/repo/[repo_id]/+page.ts

@@ -3,3 +3,5 @@ export const load = ({ params }: { params: { repo_id: string } }) => {
     repo_id: decodeURIComponent(params.repo_id),
   }
 }
+
+export const ssr = false