💥 Replace core-popup with new feature/popup module

This is a breaking change! Update your :popup settings. Old ones will
throw errors!

Doom's new popup management system casts off its shackles (hur hur) and
replaces them with the monster that is `display-buffer-alist`, and
window parameters.

However, this is highly experimental! Expect edge cases.  Particularly
with org-mode and magit (or anything that does its own window
management).

Relevant to #261, #263, #325

modules/lang/emacs-lisp/config.el

@@ -115,8 +115,7 @@
 
 
 (def-package! overseer
-  :commands overseer-test
-  :init (set! :popup "*overseer*" :size 12))
+  :commands overseer-test)
 
 
 ;;