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, 74 insertions, 0 deletions

diff --git a/dotfiles/common/.zsh/modules/Config/installfns.sh b/dotfiles/common/.zsh/modules/Config/installfns.sh
new file mode 100755
index 0000000..149f359
--- /dev/null
+++ b/dotfiles/common/.zsh/modules/Config/installfns.sh
@@ -0,0 +1,74 @@
+#!/bin/sh
+
+fndir=$DESTDIR$fndir
+scriptdir=$DESTDIR$scriptdir
+
+/bin/sh $sdir_top/mkinstalldirs $fndir || exit 1;
+
+allfuncs="`grep ' functions=.' ${dir_top}/config.modules |
+  sed -e '/^#/d' -e '/ link=no/d' -e 's/^.* functions=//'`"
+
+allfuncs="`cd $sdir_top; echo ${allfuncs}`"
+
+test -d installfnsdir || mkdir installfnsdir
+
+# 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
+  if test -f $sdir_top/$file; then
+    case "$file" in
+      */CVS/*) continue;;
+    esac
+    if test x$FUNCTIONS_SUBDIRS != x && test x$FUNCTIONS_SUBDIRS != xno; then
+      case "$file" in
+      Completion/*/*)
+        subdir="`echo $file | sed -e 's%/[^/]*/[^/]*$%%'`"
+        instdir="$fndir/$subdir"
+        ;;
+      Completion/*)
+        instdir="$fndir/Completion"
+        ;;
+      Scripts/*)
+        instdir="$scriptdir"
+	;;
+      *)
+        subdir="`echo $file | sed -e 's%/[^/]*$%%' -e 's%^Functions/%%'`"
+        instdir="$fndir/$subdir"
+        ;;
+      esac
+    else
+      case "$file" in
+      Scripts/*)
+        instdir="$scriptdir"
+	;;
+      *)
+        instdir="$fndir"
+        ;;
+      esac
+    fi
+    basename=`basename $file`
+    ok=0
+    if test -d $instdir || /bin/sh $sdir_top/mkinstalldirs $instdir; then
+      if sed "s|@runhelpdir@|$runhelpdir|" <$sdir_top/$file \
+        >installfnsdir/$basename; then
+	if $INSTALL_DATA installfnsdir/$basename $instdir; then
+	  ok=1
+	fi
+      fi
+    fi
+    case $ok in
+      0)
+      rm -rf installfnsdir
+      exit 1
+      ;;
+    esac
+    read line < $sdir_top/$file
+    case "$line" in
+      '#!'*)
+      chmod +x $instdir/`echo $file | sed -e 's%^.*/%%'`
+      ;;
+    esac
+  fi
+done
+
+rm -rf installfnsdir