feat(ci): add workflows for nightly builds and releases

- Introduce separate workflows for nightly and release builds
- Add scripts for version management, asset uploads, and cleanup
- Improve Python environment setup and dependency caching

.gitea/scripts/sync_version_from_poetry.sh

@@ -0,0 +1,21 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+
+# Stelle sicher, dass wir im Projektverzeichnis sind
+ROOT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")/../.." && pwd)"
+cd "$ROOT_DIR"
+
+PYPROJECT="pyproject.toml"
+VERSION_FILE="VERSION"
+
+# Extrahiere die Version mit grep + sed (keine externen Abhängigkeiten nötig)
+VERSION=$(grep -E '^version\s*=' "$PYPROJECT" | head -n1 | sed -E 's/.*=\s*"([^"]+)".*/\1/')
+
+if [[ -z "$VERSION" ]]; then
+  echo "❌ Version konnte nicht aus $PYPROJECT gelesen werden."
+  exit 1
+fi
+
+printf "%s" "$VERSION" > "$VERSION_FILE"
+echo "✅ Version synchronisiert: $VERSION → $VERSION_FILE"