feat(docs): Add TS type gen, metadata JSON gen

* Generate TS types from new hardware metadata schema.
* Aggregate all hw metadata YAML into one aggregate JSON
  file for consumption by others.

docs/src/docusaurus-tree-sitter-plugin/index.js

@@ -1,3 +1,9 @@
+/*
+ * Copyright (c) 2021 The ZMK Contributors
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
 module.exports = function () {
   return {
     configureWebpack(config, isServer) {