refactor: migrate changelogs to changesets format

refactor: add changesets
refactor: chose packages to publish

.changeset/dull-news-appear.md

@@ -0,0 +1,31 @@
+---
+'@openstapps/backend': major
+---
+
+Migrate config system to cosmiconfig
+
+Configs are now written using type-checked JavaScript
+
+```js
+// @ts-check
+
+// This file is now type-safe just like TypeScript, but
+// without the compilation step
+
+/** @type {import('@openstapps/package').Type} */
+const foo = {};
+```
+
+You can write config files in JavaScript, JSON, or other
+cosmiconfig-supported formats.
+
+The config files now are
+
+- `backendrc.{js,json,...}`
+- `elasticsearchrc.{js,json,...}`
+- `prometheusrc.{js,json,...}`
+
+You can also split them into multiple files,
+as well as using the `markdown.js` helper in
+`config/default/tools` to include markdown files
+as text (see `config/f-u/about-pages`)