Added steam as a requirment

install.sh

@@ -8,6 +8,11 @@ if [[ $EUID -eq 0 ]] then
     exit 126
 fi
 
+if ! command -v steam > /dev/null 2>&1; then
+    echo "You need to install steam..."
+    exit 1
+fi
+
 ## This variable contains ether the path of your GloriousEggroll Proton,
 ## or the magic number "PATH" to indicate that it can be executed without exact tergeting
 ## We will default to GE Proton, but support other protons if those are found instead.