Pre-check spelling of the generated wikitext

### Description

Teachers often can't spell Hungarian correctly.

### Version

1.2.3

### Preferred solution

Pre-check the generated wikitext with [Hunspell](https://github.com/hunspell/hunspell) (using the [org.keyphrene](https://pypi.org/project/org.keyphrene/) binding—if it supports Python 3) and display a warning if any errors are found.

### Alternatives considered

_No response_