Add ArmCord & Steam installs, + minor updates

install-stuff/install-steam.bash

@@ -0,0 +1,21 @@
+#!/usr/bin/env bash
+set -e
+if [ $(whoami) == "root" ]; then
+    echo "Run as a normal user, not root"
+    exit 1
+fi
+
+command_exists() { type "$1" &>/dev/null; }
+
+if command_exists "apt-get"; then
+    curl -LO https://cdn.cloudflare.steamstatic.com/client/installer/steam.deb
+    sudo dpkg -i steam.deb
+elif command_exists "yum"; then
+    sudo dnf install steam -y
+elif command_exists "pacman"; then
+    echo "[multilib]\nInclude = /etc/pacman.d/mirrorlist"
+    read -p "Enable the multilib repo in /etc/pacman.conf - look above`
+    $EDITOR /etc/pacman.conf
+else
+    echo "IDK"
+fi