refactor: migrate changelogs to changesets format

refactor: add changesets
refactor: chose packages to publish

.changeset/cuddly-bobcats-roll.md

@@ -0,0 +1,11 @@
+---
+'@openstapps/api-plugin': major
+'@openstapps/api-cli': major
+'@openstapps/api': major
+---
+
+Split API into API, API-CLI and API-Plugin
+
+Plugins are now required to use `api-plugin`.
+Consumers of `api` can benefit from a slimmer package with
+no NodeJS dependencies.