Added client/lang to .eslintignore
Added client/lang to .eslintignore

Files in client/lang/*.js are auto-generated, so don't need linting.
Files in client/lang/src/*.js are actually JSON files,
and can't be linted via ESLint either.

Since client/lang/en.js and client/lang/src/en.js are usually manually
modified, we could add linting there to ensure nobody introduces syntax errors.
In case of client/lang/src/en.js, we'd need a more specialised JSON linter.

silverstripe/silverstripe-asset-admin,open-sausages/silverstripe-asset-admin,open-sausages/silverstripe-assets-gallery,silverstripe/silverstripe-asset-admin,open-sausages/silverstripe-asset-admin,open-sausages/silverstripe-assets-gallery