Add obsidian.nvim plugin, add minor changes related to home-dir cleanup

home_dir_clean.sh

@@ -0,0 +1,8 @@
+#!/bin/sh
+
+# adjust settings in src_files/shell/profile, src_files/shell/rc, or otherwise
+# for programs i actually use or programs which have simple enough configuration
+# options to follow the XDG spec.
+# this script is for everything else, which i just want to wipe out quickly.
+
+rm -rf "$HOME"/.bash*