Add license check GH Action

Signed-off-by: Tomasz Michalak <tmichalak@antmicro.com>

Author: tmichalak

.github/workflows/ci.yml

@@ -1,3 +1,11 @@
+# Copyright (C) 2017-2021  The SymbiFlow Authors.
+#
+# Use of this source code is governed by a ISC-style
+# license that can be found in the LICENSE file or at
+# https://opensource.org/licenses/ISC
+#
+# SPDX-License-Identifier: ISC
+
 name: CI tests
 on: [push, pull_request]
 jobs:
@@ -8,6 +16,8 @@ jobs:
         with:
           submodules: recursive
 
+      - uses: SymbiFlow/actions/checks@main
+
       - name: Install
         run: |
           sudo apt-get install capnproto libcapnp-dev

.readthedocs.yml

@@ -1,3 +1,11 @@
+# Copyright (C) 2017-2021  The SymbiFlow Authors.
+#
+# Use of this source code is governed by a ISC-style
+# license that can be found in the LICENSE file or at
+# https://opensource.org/licenses/ISC
+#
+# SPDX-License-Identifier: ISC
+#
 # .readthedocs.yml
 # Read the Docs configuration file
 # See https://docs.readthedocs.io/en/stable/config-file/v2.html for details

docs/environment.yml

@@ -1,3 +1,11 @@
+# Copyright (C) 2017-2021  The SymbiFlow Authors.
+#
+# Use of this source code is governed by a ISC-style
+# license that can be found in the LICENSE file or at
+# https://opensource.org/licenses/ISC
+#
+# SPDX-License-Identifier: ISC
+
 name: fpga-interchange-schema-docs
 channels:
 - SymbiFlow