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, 28 deletions

diff --git a/dotfiles/system/.local/bin/ps-mem b/dotfiles/system/.local/bin/ps-mem
deleted file mode 100755
index b24b003..0000000
--- a/dotfiles/system/.local/bin/ps-mem
+++ /dev/null
@@ -1,28 +0,0 @@
-#!/bin/bash
-# Craig Jennings <c@cjennings.net>
-# Outputs a process's memory usage in multiple size units.
-
-# Get a list of all processes
-procs=$(ps aux --sort=-%mem | awk '{print $2, $4, $11}' | fzf)
-
-# Check if a process was selected
-if [ -z "$procs" ]; then
-	echo "No process selected."
-	exit 1
-fi
-
-# Get the PID of the selected process (first field)
-PID=$(echo $procs | awk '{print $1}')
-
-# Get the process name
-PROCNAME=$(ps -p $PID -o comm=)
-
-# Get the memory usage
-KB=$(pmap -x $PID | grep total | awk '{print $4}')
-
-# Convert to MB and GB
-MB=$(echo "scale=2; $KB / 1024" | bc)
-GB=$(echo "scale=2; $MB / 1024" | bc)
-
-# Print the memory usage
-printf "$PROCNAME (pid $PID) mem usage: $KB KB | $MB MB | $GB GB\n\n"