refactor: structure of an hexagonal architecture

Created a kernel crate to store models and future action implementations.
Will be useful to create admin cli.

docs/draft.md

@@ -3,3 +3,7 @@
 https://datatracker.ietf.org/doc/html/rfc6749
 
 https://stackoverflow.com/questions/79118231/how-to-access-the-axum-request-path-in-a-minijinja-template
+
+## Oauth2 test
+
+-> authorize