added release script and docs

release.sh

@@ -0,0 +1,66 @@
+#!/usr/bin/env bash
+
+set -e
+
+if [ -n "$(git status --porcelain)" ]; then
+    echo "Error: You have uncommitted local changes."
+    echo "Please commit or stash them before releasing."
+    echo ""
+    echo "Uncommitted files:"
+    git status --short
+    exit 1
+fi
+
+VERSION_FILE="VERSION"
+SCRIPT_FILE="post_installation_script/Nachinstallationsarbeiten_LC_Esslingen_XFCE.sh"
+
+if [ ! -f "$VERSION_FILE" ]; then
+    echo "Error: $VERSION_FILE not found"
+    exit 1
+fi
+
+CURRENT_VERSION=$(cat "$VERSION_FILE" | tr -d '\n')
+
+if [ ! -f "$SCRIPT_FILE" ]; then
+    echo "Error: $SCRIPT_FILE not found"
+    exit 1
+fi
+
+CURRENT_MAJOR=${CURRENT_VERSION#v}
+
+NEXT_VERSION=$((CURRENT_MAJOR + 1))
+NEXT_VERSION_STR="v$NEXT_VERSION"
+
+echo "Current version: $CURRENT_VERSION"
+echo "Proposed version: $NEXT_VERSION_STR"
+echo ""
+
+read -p "Confirm release version $NEXT_VERSION_STR? [y/N]: " confirm
+
+if [[ "$confirm" != "y" && "$confirm" != "Y" ]]; then
+    echo "Release aborted."
+    exit 0
+fi
+
+echo "$NEXT_VERSION_STR" > "$VERSION_FILE"
+
+sed -i.bak "s/^SCRIPT_VERSION=.*/SCRIPT_VERSION=\"$NEXT_VERSION_STR\"/" "$SCRIPT_FILE"
+if [ -f "${SCRIPT_FILE}.bak" ]; then
+    rm "${SCRIPT_FILE}.bak"
+fi
+
+git add "$VERSION_FILE" "$SCRIPT_FILE"
+git commit -m "Release $NEXT_VERSION_STR"
+
+git tag -a "$NEXT_VERSION_STR" -m "Release $NEXT_VERSION_STR"
+
+echo ""
+echo "Tag $NEXT_VERSION_STR created locally."
+read -p "Push to origin (includes tags)? [y/N]: " push_confirm
+
+if [[ "$push_confirm" == "y" || "$push_confirm" == "Y" ]]; then
+    git push origin --tags
+    echo "Done! Gitea will create release from tag $NEXT_VERSION_STR"
+else
+    echo "Release prepared locally. Push manually with: git push origin --tags"
+fi