Debug startup, support LSP, update KBDs

Debug startup:
- some packages were missing explicit use-package calls, which made this
  configuration incompatible with fresh computers. After crashing my MBP
  and trying to get this working thereafter, I learned.

Support LSP:
- LSP support for Haskell is good; embrace and prefer over Intero

Update KBDs:
- preferences change
- changing to a light theme (for now)

emacs.d/wpc/packages/wpc-ui.el

@@ -95,7 +95,7 @@
   :config
   (setq doom-themes-enable-bold t
         doom-themes-enable-italic t)
-  (load-theme 'doom-one t)
+  (load-theme 'doom-one-light t)
   (doom-themes-visual-bell-config)
   (doom-themes-org-config))