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, 59 insertions, 0 deletions

diff --git a/dotfiles/common/.zsh/modules/Config/uninstallfns.sh b/dotfiles/common/.zsh/modules/Config/uninstallfns.sh
new file mode 100755
index 0000000..7c22388
--- /dev/null
+++ b/dotfiles/common/.zsh/modules/Config/uninstallfns.sh
@@ -0,0 +1,59 @@
+#!/bin/sh
+
+fndir=$DESTDIR$fndir
+scriptdir=$DESTDIR$scriptdir
+
+allfuncs="`grep ' functions=' ${dir_top}/config.modules |
+  sed -e '/^#/d' -e '/ link=no/d' -e 's/^.* functions=//'`"
+
+allfuncs="`cd ${sdir_top}; echo ${allfuncs}`"
+
+case $fndir in
+  *$VERSION*)
+     # Version specific function directory, safe to remove completely.
+     rm -rf $fndir
+     ;;
+  *) # The following will only apply with a custom install directory
+     # with no version information.  This is rather undesirable.
+     # But let's try and do the best we can.
+     # We now have a list of files, but we need to use `test -f' to check
+     # (1) the glob got expanded (2) we are not looking at directories.
+     for file in $allfuncs; do
+       case $file in
+       Scripts/*)
+	 ;;
+       *)
+         if test -f $sdir_top/$file; then
+	   if test x$FUNCTIONS_SUBDIRS != x -a x$FUNCTIONS_SUBDIRS != xno; then
+	     file=`echo $file | sed -e 's%%^(Functions|Completion)/%'`
+	     rm -f $fndir/$file
+	   else
+	     bfile="`echo $file | sed -e 's%^.*/%%'`"
+	     rm -f "$fndir/$bfile"
+	   fi
+         fi
+	 ;;
+       esac
+     done
+     ;;
+esac
+
+case $scriptdir in
+  *$VERSION*)
+     # $scriptdir might be the parent of fndir.
+     rm -rf $scriptdir
+     ;;
+  *) for file in $allfuncs; do
+	case $file in
+	Scripts/*)
+	  if test -f $sdir_top/$file; then
+	    bfile="`echo $file | sed -e 's%^.*/%%'`"
+	    rm -f "$scriptdir/$bfile"
+	  fi
+	  ;;
+	esac
+     done
+     ;;
+esac
+
+exit 0