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, 72 deletions

diff --git a/dotfiles/system/.local/bin/dab b/dotfiles/system/.local/bin/dab
deleted file mode 100755
index e7d0fae..0000000
--- a/dotfiles/system/.local/bin/dab
+++ /dev/null
@@ -1,72 +0,0 @@
-#!/bin/env bash
-# dab - delete all but
-# Craig Jennings <c@cjennings.net>
-# deletes all files in current directory that are NOT of a specific extension
-
-# default switch values
-recurse=""
-del_dirs=""
-
-# help function
-show_help() {
-    echo "Usage: $0 [extension] [OPTION]"
-    echo "Deletes all files that do not match the given extension from the current directory."
-    echo ""
-    echo "Options:"
-    echo "-r  Delete files in directories recursively."
-    echo "-d  Delete directories if they become empty after deletions."
-    echo "-h  Display this help message and exit."
-    echo ""
-    echo "Example: $0 txt -r -d"
-    echo "This would delete all non-text files in the current directory and subdirectories. Any directories emptied by this process will also be deleted."
-    echo ""
-    echo "Note: Directories that were previously empty will remain untouched."
-}
-
-# if help was requested, show it and exit
-if [[ $1 = "-h" ]] || [[ $2 = "-h" ]] || [[ $3 = "-h" ]]; then
-    show_help
-    exit
-fi
-
-# error if nothing or * was passed
-if [[ -z $1 ]] || [[ $1 = "*" ]]; then
-    echo "ERROR: No file extension was provided or invalid extension ('*')."
-    show_help
-    exit
-fi
-
-# identify rest of arguments
-ext=$1
-if [[ $2 == *"-r"* ]] || [[ $3 == *"-r"* ]]; then
-    recurse="-R"
-fi
-
-if [[ $2 == *"-d"* ]] || [[ $3 == *"-d"* ]]; then
-    del_dirs="true"
-fi
-
-# Save empty directories into an array before deleting the files
-empty_dirs=()
-while IFS=  read -r -d $'\0'; do
-    empty_dirs+=("$REPLY")
-done < <(find . -type d -empty -print0)
-
-shopt -s globstar nullglob extglob
-
-# remove non-matching files
-for file in **; do
-    if [[ -f "$file" ]] && [[ "$file" != *".$ext" ]]; then
-        rm "$file"
-    fi
-done
-
-# remove directories emptied by this operation
-if [[ $del_dirs == "true" ]]; then
-    for dir in **/; do
-        if [[ ! -n "$(ls -A $dir)" ]] && [[ ! "${empty_dirs[*]}" =~ $dir ]]; then
-            rmdir "$dir"
-        fi
-    done
-fi
-