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, 3 deletions

diff --git a/dotfiles/system/.config/audacious/QtUi.conf b/dotfiles/system/.config/audacious/QtUi.conf
deleted file mode 100644
index 18b3f4c..0000000
--- a/dotfiles/system/.config/audacious/QtUi.conf
+++ /dev/null
@@ -1,3 +0,0 @@
-[General]
-geometry=@ByteArray(\x1\xd9\xd0\xcb\0\x3\0\0\0\0\0\0\0\0\0\xe\0\0\x4g\0\0\x2\xef\0\0\0\0\0\0\0\xe\0\0\x4g\0\0\x2\xef\0\0\0\0\0\0\0\0\x4h\0\0\0\0\0\0\0\xe\0\0\x4g\0\0\x2\xef)
-windowState=@ByteArray(\0\0\0\xff\0\0\0\0\xfd\0\0\0\0\0\0\x4h\0\0\x2\x93\0\0\0\x4\0\0\0\x4\0\0\0\b\0\0\0\b\xfc\0\0\0\x1\0\0\0\x2\0\0\0\x1\0\0\0\x16\0M\0\x61\0i\0n\0T\0o\0o\0l\0\x42\0\x61\0r\x1\0\0\0\0\xff\xff\xff\xff\0\0\0\0\0\0\0\0)