feat: Add an uninstall script and make systemctl commands in the install script more robust.

uninstall.sh

@@ -0,0 +1,22 @@
+#!/bin/bash
+
+# Exit immediately if a command exits with a non-zero status
+set -e
+
+echo "Stopping and disabling Toak systemd service..."
+systemctl --user stop toak.service || true
+systemctl --user disable toak.service || true
+
+echo "Removing systemd service file..."
+sudo rm -f ~/.config/systemd/user/toak.service
+systemctl --user daemon-reload
+
+echo "Removing Toak executable..."
+sudo rm -f /usr/bin/toak
+
+if [ -f "/usr/share/zsh/site-functions/_toak" ]; then
+    echo "Removing zsh completions..."
+    sudo rm -f /usr/share/zsh/site-functions/_toak
+fi
+
+echo "Toak has been successfully uninstalled."