Migrate from stow to dm theme manager

Move all config files from .config/ into themes/dracula/.config/ so the
dm tool can manage them as file-level symlinks. Removes .bak file.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

themes/dracula/.config/waybar/modules/update-check.sh

@@ -0,0 +1,8 @@
+#!/bin/bash
+updates=$(($(checkupdates 2>/dev/null | wc -l) + $(paru -Qum 2>/dev/null | wc -l)))
+
+if [ "$updates" -gt 0 ]; then
+    echo '{"text":"⟳","class":"updates-available"}'
+else
+    echo '{"text":"⟳","class":"no-updates"}'
+fi