💥 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/tools/password-store/config.el

@@ -21,7 +21,7 @@
   :commands pass
   :config
   (set! :evil-state 'pass-mode 'emacs)
-  (set! :popup "*Password-Store*" :align 'left :size 32 :select t :autokill t :noesc t)
+  (set! :popup "^\\*Password-Store" '((side . left)) '((escape-quit)))
   (map! :map pass-mode-map
         "j"   #'pass-next-entry
         "k"   #'pass-prev-entry