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.

modules/lang/javascript/packages.el

@@ -1,17 +1,21 @@
 ;; -*- no-byte-compile: t; -*-
 ;;; lang/javascript/packages.el
 
+;; major modes
 (package! coffee-mode)
-(package! eslintd-fix)
 (package! js2-mode)
+(package! rjsx-mode)
+(package! typescript-mode)
+
+;; tools
+(package! eslintd-fix)
 (package! js2-refactor)
 (package! nodejs-repl)
-(package! rjsx-mode)
-(package! skewer-mode)
-(package! tide)
-(package! typescript-mode)
 (package! npm-mode)
+(package! skewer-mode)
 
 (when (featurep! :feature lookup)
   (package! xref-js2))
 
+(unless (featurep! +lsp)
+  (package! tide))