Implement fsharp :lang module

modules/lang/fsharp/config.el

@@ -0,0 +1,13 @@
+;;; lang/fsharp/config.el -*- lexical-binding: t; -*-
+
+(after! fsharp-mode
+  (setq fsharp-ac-use-popup nil) ; Use a buffer for docs rather than a pop-up
+  (set-lookup-handlers! 'fsharp-mode :async t :definition #'fsharp-ac/gotodefn-at-point)
+  (set-company-backend! 'fsharp-mode 'fsharp-ac/company-backend)
+  (set-repl-handler! 'fsharp-mode #'fsharp-show-subshell)
+  (map! :localleader
+        :map fsharp-mode-map
+        "b" #'fsharp-ac/pop-gotodefn-stack ; Useful for re-tracing your steps
+        "l" #'fsharp-load-buffer-file
+        "q" #'fsharp-ac/stop-process
+        "t" #'fsharp-ac/show-tooltip-at-point))

modules/lang/fsharp/packages.el

@@ -0,0 +1,4 @@
+;; -*- no-byte-compile: t; -*-
+;;; lang/fsharp/packages.el
+
+(package! fsharp-mode)