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/web/+html.el

@@ -139,3 +139,7 @@
   (set-company-backend! 'web-mode 'company-web-html))
 (after! slim-mode
   (set-company-backend! 'slim-mode 'company-web-slim))
+
+
+(when (featurep! +lsp)
+  (add-hook! (html-mode web-mode) #'+lsp|init))