📝 Add tags according to the RESUSE specification

.github/ISSUE_TEMPLATE/bug_report.md

@@ -1,4 +1,7 @@
 ---
+# SPDX-FileCopyrightText: Simon Schneegans <code@simonschneegans.de>
+# SPDX-License-Identifier: CC-BY-4.0
+
 name: Bug Report
 about: Create a report to help us improve the Burn-My-Windows Extension!
 title: ''

.github/ISSUE_TEMPLATE/feature_request.md

@@ -1,4 +1,7 @@
 ---
+# SPDX-FileCopyrightText: Simon Schneegans <code@simonschneegans.de>
+# SPDX-License-Identifier: CC-BY-4.0
+
 name: General Feature Request
 about: Suggest an idea for the Burn-My-Windows Extension.
 title: ''

.github/ISSUE_TEMPLATE/new_effect.md

@@ -1,4 +1,7 @@
 ---
+# SPDX-FileCopyrightText: Simon Schneegans <code@simonschneegans.de>
+# SPDX-License-Identifier: CC-BY-4.0
+
 name: New Effect
 about: Suggest a new effect for the Burn-My-Windows Extension.
 title: ''