fix: wrapping errors for detecting custom errors

[itsmihir]

Description of the change

pongo2 was converting the error to string, so detecting any other custom error was impossible. With these changes, we can detect custom errors.

Type of change

• Bug fix (non-breaking change that fixes an issue)

Related issues

Fix #1

Checklists

Development

• Lint rules pass locally
• The code changed/added as part of this pull request has been covered with tests
• All tests related to the changed code pass in development

Code review

• This pull request has a descriptive title and information useful to a reviewer. There may be a screenshot or screencast attached
• "Ready for review" label attached to the PR and reviewers mentioned in a comment
• Changes have been reviewed by at least one other engineer
• Issue from task tracker has a link to this pull request

[sprksh]

LGTM