Omarchy install - capture install log (#868)

* Omarchy install log

* Slim down the logging setup a bit, put it in a known directory, tell user about it

* Stick to what was

* Not needed here

* Prefer the duplication

---------

Co-authored-by: David Heinemeier Hansson <david@hey.com>

install/log/before-install.sh

@@ -0,0 +1,16 @@
+#!/usr/bin/env bash
+
+# Start logging a copy of everything sent to STDOUT and STDERR
+mkdir -p ~/.local/state/omarchy/logs/
+exec &> >(tee -a ~/.local/state/omarchy/logs/installation.log)
+
+echo "--- System state before installation ---"
+sudo pacman -S --noconfirm fastfetch
+fastfetch
+
+echo -e "\n--- System logs (journalctl / current boot) ---"
+journalctl -b --no-pager
+
+echo -e "\n--- Pacman packages (before installation) ---"
+echo "Total packages installed: $(pacman -Q | wc -l)"
+pacman -Q