scripts: Adding scripts which generate verilog files.

This script generates the following files from the `definition.json`
file each cell contains;

 - Top level verilog file which includes functional or behavioral
   modules.

 - Black box definition modules.

 - Wrappers (which forward to the correct model) for different cell
   sizes.

 - A basic test bench.

Signed-off-by: Tim 'mithro' Ansell <me@mith.ro>

scripts/python-skywater-pdk/skywater_pdk/verilog/copyright.py

@@ -0,0 +1,31 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+#
+# Copyright 2020 The SkyWater PDK Authors.
+#
+# Use of this source code is governed by the Apache 2.0
+# license that can be found in the LICENSE file or at
+# https://www.apache.org/licenses/LICENSE-2.0
+#
+# SPDX-License-Identifier: Apache-2.0
+
+
+header = """\
+/**
+ * Copyright 2020 The SkyWater PDK Authors
+ *
+ * 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
+ *
+ *     https://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.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+"""