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, 0 insertions, 29 deletions

diff --git a/dotfiles/system/.zsh/modules/Test/V08zpty.ztst b/dotfiles/system/.zsh/modules/Test/V08zpty.ztst
deleted file mode 100644
index b0cbfa0..0000000
--- a/dotfiles/system/.zsh/modules/Test/V08zpty.ztst
+++ /dev/null
@@ -1,29 +0,0 @@
-# zpty is required by tests of interactive modes of the shell itself.
-# This tests some extra things.
-
-%prep
-
-  if ! zmodload zsh/zpty 2>/dev/null
-  then
-    ZTST_unimplemented="the zsh/zpty module is not available"
-  elif [[ $OSTYPE = cygwin ]]; then
-    ZTST_unimplemented="the zsh/zpty module does not work on Cygwin"
-  fi
-
-%test
-
-  zpty cat cat
-  zpty -w cat a line of text
-  var=
-  zpty -r cat var && print -r -- ${var%%$'\r\n'}
-  zpty -d cat
-0:zpty with a process that does not set up the terminal: internal write
->a line of text
-
-  zpty cat cat
-  print a line of text | zpty -w cat
-  var=
-  zpty -r cat var && print -r -- ${var%%$'\r\n'}
-  zpty -d cat
-0:zpty with a process that does not set up the terminal: write via stdin
->a line of text