refactor(dotfiles): rename system/ to common/ and remove unused configs

Rename dotfiles/system to dotfiles/common for clarity - indicates
shared dotfiles used across all desktop environments (DWM, Hyprland).

Removed config directories for uninstalled applications:
- ghostty (using different terminal)
- lf (using ranger instead)
- mopidy (using mpd instead)
- nitrogen (X11-only, obsolete for Wayland)
- pychess (not installed)
- JetBrains (not installed via archsetup)
- youtube-dl (using yt-dlp with different config location)

Kept audacious config for potential future use.

Updated all references in archsetup, CLAUDE.md, todo.org, and
validation.sh.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

1 files changed, 33 insertions, 0 deletions

diff --git a/dotfiles/common/.zsh/modules/Test/B08shift.ztst b/dotfiles/common/.zsh/modules/Test/B08shift.ztst
new file mode 100644
index 0000000..0aa9226
--- /dev/null
+++ b/dotfiles/common/.zsh/modules/Test/B08shift.ztst
@@ -0,0 +1,33 @@
+# Test the shift builtin.
+
+%test
+
+  set -- one two three four five six seven eight nine ten
+  shift
+  print $*
+  shift 2
+  print $*
+  shift -p 3
+  print $*
+  shift -p
+  print $*
+0:shifting positional parameters
+>two three four five six seven eight nine ten
+>four five six seven eight nine ten
+>four five six seven
+>four five six
+
+  array=(yan tan tether mether pip azer sezar akker conter dick)
+  shift 2 array
+  print $array
+  shift array
+  print $array
+  shift -p 3 array
+  print $array
+  shift -p array
+  print $array
+0:shifting array
+>tether mether pip azer sezar akker conter dick
+>mether pip azer sezar akker conter dick
+>mether pip azer sezar
+>mether pip azer