core-lib: add auto-minor-mode, revise def-project-mode!

- Adds the auto-minor-mode package to replace our in-house
  implementation.
- Merges associate! into the def-project-mode! macro because associate!
  on its own is less useful than auto-minor-mode-alist,
  auto-minor-mode-magic-alist or hooks.
- Changes the semantics of :modes and :add-hooks properties of
  def-project-mode!. Its arguments are evaluated as is; lists will need
  to be quoted.

squash! core-lib: remove associate! macro

modules/lang/lua/config.el

@@ -34,7 +34,7 @@
 ;;; Frameworks
 
 (def-project-mode! +lua-love-mode
-  :modes (moonscript-mode lua-mode markdown-mode json-mode)
+  :modes '(moonscript-mode lua-mode markdown-mode json-mode)
   :when #'+lua-love-project-root
   :on-load
   (progn