feat(detect): if steam and yad not found stop the program

steamtinkerlaunch

@@ -618,6 +618,12 @@ function setSteamPath {
 }
 
 function setSteamPaths {
+	if [ ! -x "$(command -v "steam")" ]; then
+		echo "ERROR" "${FUNCNAME[0]} - Steam not found"
+		writelog "ERROR" "${FUNCNAME[0]} - Steam not found"
+		exit 0
+	fi
+
 	if [ -f "$STPAVARS" ] && grep -q "^SUSDA" "$STPAVARS" ; then
 		writelog "INFO" "${FUNCNAME[0]} - Reading Steam Path variables from '$STPAVARS'"
 		loadCfg "$STPAVARS" X
@@ -18243,6 +18249,11 @@ function checkIntDeps {
 		if [ -z "$YAD" ]; then
 			YAD="$(command -v "yad")"
 		fi
+
+		if [ "$YAD" ]; then
+			writelog "ERROR" "${FUNCNAME[0]} - Could not find yad" "E"
+			exit 0
+		fi
 
 		if [ -n "$YAD" ] && [ ! -f "$YAD" ]; then
 			OYAD="$YAD"