docs: update README

Author: humblehacker

README.md

@@ -1,11 +1,37 @@
 # MacHelix
 
-A GUI wrapper around the terminal based editor [Helix](https://helix-editor.com/)
+A proof-of-concept GUI wrapper around the terminal based editor [Helix](https://helix-editor.com/)
 
 ![MacHelix main window](./media/MacHelixMainWindow.png)
 
-## Features
+## Background
+
+I became interested in Helix while searching for alternatives to JetBrains' AppCode after it was 
+announced that it would be no longer be developed. There's a lot to like, but personally I 
+prefer my editor to support standard operating system affordances such as access to the system
+clipboard, drag-and-drop (including a draggable proxy icon), etc. I have been using vim for 
+years on the Mac - mainly through the excellent MacVim. I wanted the same thing for Helix. 
+Discussions on developing a gui wrapper for Helix are ongoing, but so far, afaik, development
+has not yet started.
+
+So I had the idea that maybe I could do a sort of poor-man's wrapper by embedding a terminal
+in a Mac app to run Helix in, and communicating between the wrapper app and Helix via some sort
+of IPC. MacHelix is the result.
+
+## Current Features
 
 - Drag and drop
 - Titlebar shows filename and draggable proxy icon for the file in the active view
 - Copy/Paste with ⌘C and ⌘V
+- Select All with ⌘A
+- Window background changes with helix theme changes
+
+## Status
+
+The project is prototype quality. It exists mainly to satisfy my curiosity that such an app is
+possible/practical. It will take quite a bit of work to bring this to production quality. It 
+includes an embedded custom build of `hx` with rudimentary IPC implemented via named pipes.
+
+The terminal layer comes from my fork of [SwiftTerm](https://github.com/humblehacker/SwiftTerm),
+with some really rough fixes for sgr mouse support (with code borrowed from 
+[iTerm](https://github.com/gnachman/iTerm2)).