[6892] Add error pages (404, 500) to Wordify BP

[jvega190]

craftercms/craftercms#6892

[jvega190]

@rart here are some screenshots for review:

404:

500:

[rart]

Would it be possible to preserve header/footer?

[jvega190]

Would it be possible to preserve header/footer?

Both header and footer need the model for it to render (social media items, about us content, quick links, copyright text)

[sumerjabri]

Please update the version numbers in craftercms-plugin.yaml. If this doesn't break compatibility, then just bump the BP version number.

[jvega190]

@sumerjabri version updated, compatibility stays the same