Update .github directory: add copyright information

- Exclude renovate.json
- Rename reuse.toml: capitalization

Signed-off-by: Suguru Hirahara <acioustick@noreply.codeberg.org>

REUSE.toml

@@ -0,0 +1,26 @@
+# SPDX-FileCopyrightText: 2024 Suguru Hirahara
+#
+# SPDX-License-Identifier: AGPL-3.0-or-later
+
+version = 1
+
+# Computer-generated files and other files which cannot be copyrighted
+[[annotations]]
+path = [
+    ".github/renovate.json",
+    "i18n/.gitignore",
+    "i18n/requirements.txt",
+    "i18n/PUBLISHED_LANGUAGES"
+]
+SPDX-FileCopyrightText = "NONE"
+SPDX-License-Identifier = "CC0-1.0"
+
+# See https://reuse.software/faq/#aggregate-info
+[[annotations]]
+path = [
+    "i18n/**/*.po",
+    "i18n/**/*.pot"
+]
+precedence = "aggregate"
+SPDX-FileCopyrightText = "Slavi Pantaleev, MDAD community members"
+SPDX-License-Identifier = "AGPL-3.0-or-later"