[forum#dev] add CHANGELOG file

CHANGELOG.md

+# Change Log | `MetaboHUB - Forum Library`
+
+## About
+
+All notable changes to `MetaboHUB - Forum Library` project will be documented in this file.
+
+The format is based on [Keep a Changelog](http://keepachangelog.com/)
+and this project adheres to [Semantic Versioning](http://semver.org/).
+
+## [Unreleased] - 2023-02-07
+
+Initial release of the library.
+
+### Added
+
+- [forum#dev]
+  MAJOR - add basic web-components: `<mth-forum-form-finder />`, `<mth-forum-results-display />` and `<mth-forum-literature-display />`

README.md

@@ -190,6 +190,8 @@ Please read [CONTRIBUTING.md](https://gist.github.com/PurpleBooth/b24679402957c6
 We use [GitLab](https://services.pfem.clermont.inrae.fr/gitlab/forum/metabohub-forum-library/) for versioning.
 For the versions available, see the [tags on this repository](https://services.pfem.clermont.inrae.fr/gitlab/forum/metabohub-forum-library/tags).
 
+Consult the [Changelog file](CHANGELOG.md) for further informations about versions and changes.
+
 ## Authors
 
 * **Nils Paulhe** - *Initial work* - MetaboHUB, INRAE, PFEM.