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, 28 insertions, 0 deletions

diff --git a/dotfiles/common/.local/bin/ps-mem b/dotfiles/common/.local/bin/ps-mem
new file mode 100755
index 0000000..b24b003
--- /dev/null
+++ b/dotfiles/common/.local/bin/ps-mem
@@ -0,0 +1,28 @@
+#!/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"