Update root README file

README.md

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 # Taipy Studio GUI Helper
 
-Taipy Studio is ultimately an application that allows for creating Taipy applications
-reducing the code that needs to be manually created.
+This is a [Visual Studio Code](https://code.visualstudio.com/) extension that provides
+[Taipy GUI](https://pypi.org/project/taipy-gui/) developers with features that make the
+definition of Taipy GUI pages with the Markdown syntax significantly more efficient.
 
-This application builder comes with predefined features that greatly accelerate
-the development of applications that rely on Taipy Core.
+You can get all the relevant information on this extension on the
+[Taipy Studio GUI](https://docs.taipy.io/en/latest/manuals/studio/gui/)
+documentation page.
 
-Taipy Studio depends on [Visual Studio Code](https://code.visualstudio.com/) which provides a
-full development environment, including state-of-the-art support for the Python programming
-language. The Taipy-specific functionality is provided as a Visual Studio Code extension,
-which this repository holds the source code.<br/>
+## Features
+
+Markdown edition of `.md` file or as string content within Python code
+has support for quickly defining visual elements:
+
+- IntelliSense:<br/>
+  Element types and properties are proposed to the programmer as they are
+  typed.<br/>
+  This is also true for variable names in the context of property values.
+
+- Diagnostics:<br/>
+  Syntactic or structural errors and warnings are reported in the text source
+  and the Problems view.
+
+- Snippets:<br/>
+  Keyboard shortcuts are defined to generate visual elements.
+
+- Element generation:</br>
+  A command that takes the developer through a step-by-step process to define
+  a visual element type and properties.