Refactor install logic, use file-based overrides per OS/distro

docs/todo.md

@@ -8,16 +8,14 @@
     - xresources working? use from/within theme-changing logic?
 - finished artix/dinit setup
     - include figuring out wiregaurd/vpn stuff
-- switch install approach from csv file to:
-    - checking for custom file for os/distro
-    - then checking custom file for overall
-    - then just installing via package manager
-- web browsers config and install (primary: qutebrowser, alt1: brave, alt2: tor)
+- web browsers config and install (primary: qutebrowser, alt1: brave, alt2: tor?)
 - config for mpd, and client(s), (mpd clients to consider: mpc, ncmpcpp, ncmpc, inori)
 - get find, xargs, and awk (use nawk) as unified as i can across system types
 
 ## optional
 
-- pick rss reader; newsboat? others? option with inbox and separate queues?
+- configured neomutt
+- picked and configured rss reader
+    - newsboat? others? option with inbox and separate queues?
 - make all these scripts POSIX-compliant (or at least usable in ksh/oksh)