Move some code out of init into placement

It makes more sense to delegate to `placement.lisp' the creation of
workspaces since it is also this file that sets my preferences in
terms of workspaces per window.

placement.lisp

@@ -1,3 +1,13 @@
+;;; workspaces
+(when *initializing*
+  (grename "term")
+  (gnewbg  "emacs")
+  (gnewbg  "browser")
+  (gnewbg  "files")
+  (gnewbg  "discord")
+  (gnewbg  "media")
+  (gnewbg  "private"))
+
 (clear-window-placement-rules)
 
 (define-frame-preference "browser"