add missing license headers and file docstrings

seal5/backends/riscv_register_info/templates/__init__.py

@@ -1,3 +1,22 @@
+#
+# Copyright (c) 2023 TUM Department of Electrical and Computer Engineering.
+#
+# This file is part of Seal5.
+# See https://github.com/tum-ei-eda/seal5.git for further info.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+"""Templates for RISCVRegisterInfo.td patches"""
 import pathlib
 
 template_dir = pathlib.Path(__file__).parent.resolve()