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>

.config/fish/functions/yazi-cd.fish

@@ -1,8 +0,0 @@
-function yazi-cd
-    set tmpfile (mktemp)
-    yazi --cwd-file="$tmpfile"
-    if test -s "$tmpfile"
-        cd (cat "$tmpfile")
-    end
-    rm -f "$tmpfile"
-end