Fixed circuit dir creation issue

- If the directory path that we needed to create contained more than `1`
  directory, it would fail.

zero_bin/common/src/prover_state/persistence.rs

@@ -93,7 +93,7 @@ pub(crate) trait DiskResource {
 
         // Create the base folder if non-existent.
         if std::fs::metadata(&circuits_dir).is_err() {
-            std::fs::create_dir(&circuits_dir).map_err(|err| {
+            std::fs::create_dir_all(&circuits_dir).map_err(|err| {
                 DiskResourceError::IoError::<Self::Error>(std::io::Error::other(format!(
                     "Could not create circuits folder at {} (err: {})",
                     err, circuits_dir