Add standalone build and packaging workflow docs/scripts

build/package_linux.sh

@@ -0,0 +1,24 @@
+#!/bin/bash
+
+set -euo pipefail
+
+ROOT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
+cd "$ROOT_DIR"
+
+APP_DIR="dist/PDFtoICS"
+VERSION="$(tr -d '[:space:]' < version.txt)"
+OUT_DIR="release"
+ARCHIVE_NAME="PDFtoICS-linux-v${VERSION}.tar.gz"
+
+if [ ! -d "$APP_DIR" ]; then
+    echo "❌ Build-Ordner nicht gefunden: $APP_DIR"
+    echo "💡 Bitte zuerst ausführen: ./build/build_linux.sh"
+    exit 1
+fi
+
+mkdir -p "$OUT_DIR"
+
+echo "📦 Erstelle Archiv: $OUT_DIR/$ARCHIVE_NAME"
+tar -czf "$OUT_DIR/$ARCHIVE_NAME" -C dist PDFtoICS
+
+echo "✅ Fertig: $OUT_DIR/$ARCHIVE_NAME"