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/string-functions.el

@@ -14,6 +14,16 @@
   "Append \"-hook\" to X."
   (s-append "-hook" x))
 
+(defun symbol->string (symbol)
+  "Alias for `symbol-name' with SYMBOL, since I can never remember that
+function's name."
+  (symbol-name symbol))
+
+(defun string->symbol (string)
+  "Alias for `intern' for STRING since I can never remember that function's
+  name."
+  (intern string))
+
 (defun string/ensure-hookified (x)
   "Ensure that X has \"-hook\" appended to it."
   (if (s-ends-with? "-hook" x)