Allow mass-editing of similar words

One common failure mode I've found for whisper is that technical terms or proper names will often get mangled. It would be great to have a simple way to edit all instances of "similar" tokens at once.

For example, I transcribed Lilith Wittmann's cccamp23 talk and whisper (medium model) would often recognize "Bonify" (a company name) as "Bonifai", or "Schufa" (another company name) as "Schufer".

It would be great to have an easy way to modify all instances of the same or very similar tokens at once.

Alternatively, a "quick manual check" mode that would allow me to correct all low-confidence words in a single pass would be helpful. I'll file another issue for that.