feat: add launch script for linux

LinuxSteamLaunch.sh

@@ -0,0 +1,18 @@
+#!/bin/sh
+
+SCRIPT_DIR=$(cd "$(dirname "$0")" && pwd)
+ARCH=$(uname -m)
+
+if [ "$ARCH" = "x86_64" ]; then
+    exec "$SCRIPT_DIR/SpaceCalibratorx64" "$@"
+elif [ "$ARCH" = "aarch64" ] || [ "$ARCH" = "arm64" ]; then
+    if [ -e "$SCRIPT_DIR/SpaceCalibratorArm64" ]; then
+        exec "$SCRIPT_DIR/SpaceCalibratorArm64" "$@"
+    else
+        echo "SpaceCalibrator: aarch64 binary missing, falling back to x64..."
+        exec "$SCRIPT_DIR/SpaceCalibratorx64" "$@"
+    fi
+else
+    echo "SpaceCalibrator: Unsupported architecture $ARCH"
+    exit 1
+fi