Replace the current proofing features with Grammarly integration.

The proofing features in Marked 2 are very limited. In fact, it is limited to the lists of words and phrases in the proofing preferences. It doesn’t even consider the context of a word before highlighting it. Proofing is an editing function and Marked 2 is not an editor. However, it is important to proof writing. I use Grammarly a lot. Although it isn’t perfect, it is aware of context and language (US vs. UK etc), and does spelling, syntax and word choice. That would be a more welcome feature than a hard-coded list of words to highlight.