fix(script): add clean up script

Removes `src/env.d.ts` which `Astro` adds during `astro check`

Author: theisel

astro-portabletext/scripts/ci.sh

@@ -2,3 +2,4 @@
 pnpm check || exit $? # Check for Astro errors
 pnpm test:lib || exit $?
 pnpm test:component || exit $?
+rm -rf components/src || exit $?