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, 37 insertions, 0 deletions

diff --git a/dotfiles/common/.zsh/modules/LICENCE b/dotfiles/common/.zsh/modules/LICENCE
new file mode 100644
index 0000000..08fcf88
--- /dev/null
+++ b/dotfiles/common/.zsh/modules/LICENCE
@@ -0,0 +1,37 @@
+Unless otherwise noted in the header of specific files, files in this
+distribution have the licence shown below.
+
+However, note that certain shell functions are licensed under versions
+of the GNU General Public Licence.  Anyone distributing the shell as a
+binary including those files needs to take account of this.  Search
+shell functions for "Copyright" for specific copyright information.
+None of the core functions are affected by this, so those files may
+simply be omitted.
+
+--
+
+The Z Shell is copyright (c) 1992-2017 Paul Falstad, Richard Coleman,
+Zoltán Hidvégi, Andrew Main, Peter Stephenson, Sven Wischnowsky, and
+others.  All rights reserved.  Individual authors, whether or not
+specifically named, retain copyright in all changes; in what follows, they
+are referred to as `the Zsh Development Group'.  This is for convenience
+only and this body has no legal status.  The Z shell is distributed under
+the following licence; any provisions made in individual files take
+precedence.
+
+Permission is hereby granted, without written agreement and without
+licence or royalty fees, to use, copy, modify, and distribute this
+software and to distribute modified versions of this software for any
+purpose, provided that the above copyright notice and the following
+two paragraphs appear in all copies of this software.
+
+In no event shall the Zsh Development Group be liable to any party for
+direct, indirect, special, incidental, or consequential damages arising out
+of the use of this software and its documentation, even if the Zsh
+Development Group have been advised of the possibility of such damage.
+
+The Zsh Development Group specifically disclaim any warranties, including,
+but not limited to, the implied warranties of merchantability and fitness
+for a particular purpose.  The software provided hereunder is on an "as is"
+basis, and the Zsh Development Group have no obligation to provide
+maintenance, support, updates, enhancements, or modifications.