fix: add default ecosystem configs folder to .prettierignore (#2707)

## What ❔

Added `configs` folder in the root directory to `.prettierignore`

## Why ❔

Ecosystem configs may include generated JS config files that may not
pass `zk fmt --check`.
This change prevents errors during `zk fmt` execution.

## Checklist

- [x] PR title corresponds to the body of PR (we generate changelog
entries from PRs).
- [x] Tests for the changes have been added / updated.
- [x] Documentation comments have been added / updated.
- [x] Code has been formatted via `zk fmt` and `zk lint`.

.prettierignore

@@ -26,8 +26,11 @@ binaryen
 system-contracts
 artifacts-zk
 cache-zk
-// Ignore directories with OZ and forge submodules.
+# Ignore directories with OZ and forge submodules.
 contracts/l1-contracts/lib
 
+# Ignore ecosystem configs
+/configs/
+
 **/.git
 **/node_modules