Dwijayas Inu For sitemap : Copy and paste your url on to Notepad and save it as sitemap.txt. Don't worry because Google support several format sitemap (further reading https://developers.google.com/search/docs/advanced/sitemaps/build-sitemap).

For robots.txt : Copy and paste as below on to Notepad and save it as robots.txt.

User-agent: Mediapartners-Google
Disallow:

User-agent: *
Disallow: /search
Allow: /

Sitemap: http://yoursite/sitemap.txt