Add a status section in the README

Signed-off-by: Francis Bouvier <francis@lightpanda.io>

README.md

@@ -48,6 +48,28 @@ If we want both Javascript and performance, for a real headless browser, we need
 - Low-level system programming language (Zig) with optimisations in mind
 - Opinionated, no rendering
 
+## Status
+
+Lightpanda is still a work in progress and is currently at the Alpha stage.
+
+Here are the key features we want to implement before releasing a Beta version:
+
+- [x] Loader
+- [x] HTML parser and DOM tree
+- [x] Javascript support
+- [x] Basic DOM APIs
+- [x] Ajax
+  - [x] XHR API
+  - [ ] Fetch API
+- [x] DOM dump
+- [ ] Basic CDP server
+
+We will not provide binary versions until we reach at least the Beta stage.
+
+NOTE: There are hundreds of Web APIs. Developing a browser, even just for headless mode, is a huge task. It's more about coverage than a _working/not working_ binary situation.
+
+You can also follow the progess of our Javascript support in our dedicated [zig-js-runtime](https://github.com/lightpanda-io/zig-js-runtime#development) project.
+
 ## Build from sources
 
 We do not provide yet binary versions of Lightpanda, you have to compile it from source.