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, 19 deletions

diff --git a/dotfiles/system/.zsh/modules/Src/signames1.awk b/dotfiles/system/.zsh/modules/Src/signames1.awk
deleted file mode 100644
index 27d21ac..0000000
--- a/dotfiles/system/.zsh/modules/Src/signames1.awk
+++ /dev/null
@@ -1,19 +0,0 @@
-# This is an awk script which finds out what the possibilities for
-# the signal names are, and dumps them out so that cpp can turn them
-# into numbers.  Since we don't need to decide here what the
-# real signals are, we can afford to be generous about definitions,
-# in case the definitions are in terms of other definitions.
-# However, we need to avoid definitions with parentheses, which will
-# mess up the syntax.
-BEGIN { printf "#include <signal.h>\n\n" }
-
-/^[\t ]*#[\t ]*define[\t _]*SIG[A-Z][A-Z0-9]*[\t ][\t ]*[^(\t ]/ { 
-    sigindex = index($0, "SIG")
-    sigtail = substr($0, sigindex, 80)
-    split(sigtail, tmp)
-    signam = substr(tmp[1], 4, 20)
-    if (substr($0, sigindex-1, 1) == "_")
-        printf("XXNAMES XXSIG%s _SIG%s\n", signam, signam)
-    else
-        printf("XXNAMES XXSIG%s SIG%s\n", signam, signam)
-}