feat: added woodpecker CI definition

.woodpecker.yml

@@ -0,0 +1,20 @@
+# SPDX-FileCopyrightText: 2023 Tobias Schmidl
+#
+# SPDX-License-Identifier: AGPL-3.0-or-later
+
+---
+steps:
+
+  editor-config:
+    image: mstruebing/editorconfig-checker
+    group: lint
+
+  reuse:
+    image: fsfe/reuse:latest
+    group: lint
+
+  shellcheck:
+    image: koalaman/shellcheck-alpine
+    commands:
+      - find . -name .git -type d -prune -o -type f -name \*.sh -print0 | xargs -0 -r -n1 shellcheck
+...