Add HTML rendering of markdown notes

A plugin should be able to create a React page inside a webview that can allow data in/out

Feels like Phase0 could be a webview that renders ReadOnly HTML (in a document or a split), ideally with an API that you can feed markdown to and it will render the HTML. This would have utility for reports and the like.

Then, making that WebView read/write is the goal. Pasting conversation from Discord:

dwertheimer — Yesterday at 1:57 PM
@Eduard I was thinking about your React/HTML in a webview pane idea and was thinking this would be a great solution to one of NP's biggest missing features -- tables. Would be awesome if you could have a MD doc underneath and a webview with the MD TABLE rendered in HTML (and editable in React/HTML with data passing back to the underlying NP Markdown doc). Typora does a pretty nice job of this (obviously would work differently in NP, but you get the idea).

Eduard — Today at 9:00 AM
Tables are possible with Swift, just a bit harder. But yes, a web view could solve that problem definitely faster. We have to think about the plugin structure first, however. How does a plugin provide the UI exactly. Maybe we could run a reactJS app inside a WebView simply.
Still we need to give that react js app the existing API to work with
Somehow
dwertheimer — Today at 9:03 AM
This is @codedungeon’s world ^^
NotePlan probably has to run a little web server
Eduard — Today at 9:21 AM
Not sure about that if its a ReactJS app, which is running no backend, only frontend, but I have no experience yet
codedungeon — Today at 9:30 AM
Q: What is the data source?
Q: Do you want to have read/write access to data?