docs: Update README.md

* Add remark that the ASAM OSI MCAP sepcification is still in draft mode

Signed-off-by: Carlo van Driesten <carlo.van-driesten@bmw.de>

Author: jdsika

README.md

@@ -2,7 +2,11 @@
 
 ## What is this extension about?
 
-This is a custom extension for Lichtblick that enables to add a panel showing the Ground Truth Hierarchy data in a tree view.
+This is a custom extension for Lichtblick that enables to add a panel showing the ASAM OSI Ground Truth Hierarchy data in a tree view.
+
+:warning: **Current version not compliant with official ASAM OSI**:
+
+Current ASAM OSI [tracefile formats](https://opensimulationinterface.github.io/osi-antora-generator/asamosi/latest/interface/architecture/trace_file_formats.html) do not yet include the draft for the MCAP Multitrace Format. This will be officially completed in this [OpenX Project Proposal](https://code.asam.net/simulation/openx/-/issues/17). You can use the [ASAM OSI Utilities](https://github.com/Lichtblick-Suite/asam-osi-utilities/blob/main/examples/convert_osi2mcap.cpp) to create OSI MCAP traces according to the current [specification draft](https://github.com/OpenSimulationInterface/open-simulation-interface/pull/841).
 
 ## Getting started