docs: README pass, add alternative editor documentation (Zed) (#4137)

I'm switching away from visual studio (because its broken) so figured
I'd document / commit the minimum to get a working environment with the
editor I chose (Zed).

Also cleaned up the main README so it's not so verbose, link out to
secondary pages, etc.

I also deleted the Arch and Fedora dockerfiles, they were broken. The
ubuntu one still works, so i left it.

docs/setup/dev/zed.md

@@ -0,0 +1,25 @@
+# Zed
+
+Zed comes with out of the box C++ support via `clangd`.  The project comes with a bunch of already setup task and debug configurations.  Note that many of them depend on the usage of `task` to make them cross-OS compatible (Zed at this time doesn't allow for OS-conditional logic within the task definitions).
+
+## Recommended Extensions:
+
+- NeoCMake
+
+## Building the Project
+
+We are going to build a debug version of the project because that is most useful for development.
+
+Run the `task: spawn` command (default shortcut is `Alt-Shift-T`) and run `Generate CMake: Debug`
+
+![](/docs/img/editors/zed/zed-gen-cmake.png)
+
+Then do the same thing to run `Build Project: Debug`
+
+![](/docs/img/editors/zed/zed-build-proj.png)
+
+The project is now fully built, you can now for example -- launch the REPL (`goalc`), or the game (`gk`) and attach breakpoints.
+
+![](/docs/img/editors/zed/zed-run-example.png)
+
+![](/docs/img/editors/zed/zed-debugger.png)