Create @matrix-org/spec npm package containing sas-emoji.json (#1620)

* Create packages/npm @matrix-org/spec npm package containing spec-emoji

* Initial workflow script

* Add newsfragment

* Add docs

* npm publish doesn't like symlinks, yarn does :((

packages/npm/.gitignore

@@ -0,0 +1,2 @@
+node_modules
+sas-emoji.json

packages/npm/package.json

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+{
+  "name": "@matrix-org/spec",
+  "version": "0.0.0",
+  "description": "Data definitions for the Matrix Spec",
+  "author": "matrix.org",
+  "license": "Apache-2.0",
+  "files": [
+    "sas-emoji.json"
+  ],
+  "scripts": {
+    "prepare": "cp ../../data-definitions/sas-emoji.json ."
+  }
+}

packages/npm/yarn.lock

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+# THIS IS AN AUTOGENERATED FILE. DO NOT EDIT THIS FILE DIRECTLY.
+# yarn lockfile v1
+
+