microsite: move files from old microsite

Signed-off-by: Johan Haals <johan.haals@gmail.com>

microsite/scripts/verify-sidebars.js

@@ -1,54 +0,0 @@
-/*
- * Copyright 2020 The Backstage 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
- *
- *     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.
- */
-
-/**
- * This script relies on docusaurus internals. It can be replaced in case
- * docusaurus adds proper validation of the sidebar items.
- */
-
-let metadata;
-try {
-  metadata = require('docusaurus/lib/core/metadata.js');
-} catch (error) {
-  console.log('❌ Run `yarn build` before running `yarn verify:sidebars`');
-  process.exit(1);
-}
-
-const errors = [];
-
-// reference/index is generated, so make sure this goes through even if it's not there
-const knownIds = new Set([...Object.keys(metadata), 'reference/index']);
-
-for (const id in metadata) {
-  const { next, previous } = metadata[id];
-
-  if (next && !knownIds.has(next)) {
-    errors.push(`Next ${next} does not exist in ${id}.`);
-  }
-
-  if (previous && !knownIds.has(previous)) {
-    errors.push(`Previous ${previous} does not exist in ${id}.`);
-  }
-}
-
-if (errors.length) {
-  for (const error of errors) {
-    console.log(`❌ ${error}`);
-  }
-  process.exit(1);
-}
-
-console.log('✅ All sidebar links are correct.');