added changelog and updated .gitignore

.gitignore

@@ -94,7 +94,6 @@ virtualization/vagrant/config
 # Visual Studio Code
 .vscode/*
 !.vscode/cSpell.json
-!.vscode/extensions.json
 !.vscode/tasks.json
 
 # Typing

CHANGELOG.md

@@ -0,0 +1,22 @@
+# Changelog
+
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
+and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+## [Unreleased]
+
+### Added
+
+- Added initial version of the API library.
+
+<!-- Blocks below work as a reference, don't remove them! -->
+
+<!-- ### Added -->
+
+<!-- ### Changed -->
+
+<!-- ### Removed -->
+
+<!-- ### Fixed -->