Add Welcome message and TradeMark Information

Ads Welcome paragraph
Add TradeMark information
Add reference to oniroproject.org

Signed-off-by: Gururaj Shetty <gururaj.shetty@huawei.com>

index.rst

@@ -4,9 +4,22 @@
 
 .. include:: definitions.rst
 
-|main_project_name| Project Documentation
+|main_project_name| Documentation
 #############################################
 
+Welcome to Oniro Project documentation! 
+
+You are welcome to take a tour and play with Oniro's initial code contribution.
+It is in the final stage toward becoming the project's official codebase.
+If you feel like joining, we would love to have you among the list of Oniro's
+initiating supporters. These are exciting times! There couldn't be a better
+moment for joining Oniro!
+
+To learn more about the |main_project_name|, go to https://oniroproject.org.
+
+.. note::
+   Oniro™ is a registered trademark of Eclipse Foundation.
+
 |main_project_name| is an `OpenHarmony <https://gitee.com/openharmony>`_ 
 compatible open-source project aimed at reducing fragmentation in the
 consumer and IoT device industry by providing a common technology that can