lang/csharp: update README

modules/lang/csharp/README.org

@@ -1,28 +1,39 @@
 #+TITLE: :lang csharp
 
-This module adds C# support to Emacs.
-
-#+begin_quote
-I don't use C# for much else than Unity3D and, seldomly, for Mono game
-development on Linux.
-#+end_quote
-
 * Table of Contents :TOC:
-- [[Install][Install]]
-  - [[MacOS][MacOS]]
-  - [[Arch Linux][Arch Linux]]
+- [[#description][Description]]
+  - [[#module-flags][Module Flags]]
+  - [[#plugins][Plugins]]
+- [[#prerequisites][Prerequisites]]
+  - [[#macos][MacOS]]
+  - [[#arch-linux][Arch Linux]]
+  - [[#nixos][NixOS]]
 
-* Install
+* Description
+This module adds C# support to Emacs. Powered by omnisharp (directly or through
+LSP).
+
+** Module Flags
++ =+lsp= Enables omnisharp through LSP support (requires)
++ =+unity= Enables special support for the [[https://unity.com/][Unity game engine]] (particularly,
+  support for HLSL shaders).
+
+** Plugins
++ [[https://github.com/josteink/csharp-mode][csharp-mode]]
++ [[https://github.com/OmniSharp/omnisharp-emacs][omnisharp]]* (not =+lsp=)
++ [[https://github.com/midnightSuyama/shader-mode][shader-mode]]* (=+unity=)
+
+* Prerequisites
 This module needs:
 
-+ omnisharp-roslyn (install with ~M-x omnisharp-install-server~)
++ omnisharp (with the ~+lsp~ flag, this must be installed externally. Without
+  it, use ~M-x omnisharp-install-server~)
 + .NET SDKs (on Windows)
 + Mono (on UNIX platforms)
 
-** MacOS
-=TODO=
-
+** TODO MacOS
 ** Arch Linux
-#+BEGIN_SRC sh :dir /sudo:: :tangle (if (doom-system-os 'arch) "yes")
+#+BEGIN_SRC sh
 sudo pacman --needed --noconfirm -S mono
 #+END_SRC
+** TODO NixOS