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, 15 deletions

diff --git a/dotfiles/system/.config/calibre/shortcuts/main.json b/dotfiles/system/.config/calibre/shortcuts/main.json
deleted file mode 100644
index 3af458c..0000000
--- a/dotfiles/system/.config/calibre/shortcuts/main.json
+++ /dev/null
@@ -1,15 +0,0 @@
-{
-  "map": {
-    "Interface Action: Edit Collections (Edit Collections) - qaction": [
-      "Ctrl+Shift+C"
-    ],
-    "Interface Action: Extract ISBN (Extract ISBN) - qaction": [
-      "Ctrl+I"
-    ],
-    "Interface Action: Quickview (Quickview) - qaction": [],
-    "quit calibre": [
-      "Q"
-    ]
-  },
-  "options_map": {}
-}
\ No newline at end of file