Add basic LSP support

Still needs to be documented, but includes support for the following
languages:

+ C/C++/ObjC
+ Go
+ Java
+ Javascript
+ OCaml
+ PHP
+ Python
+ Ruby
+ Scala
+ Swift
+ HTML/CSS

Relevant to #460, #716, #1186

modules/lang/javascript/config.el

@@ -122,7 +122,12 @@
 ;;
 ;; Tools
 
+(when (featurep! +lsp)
+  (add-hook! (js2-mode rjsx-mode typescript-mode) #'+lsp|init))
+
+
 (def-package! tide
+  :unless (featurep! +lsp)
   :defer t
   :init
   ;; Don't let hard errors stop the user from opening js files.