Add the Token file version in the about page and the corresponding documentation

[B3nz01d]

Context

Issue 1

As a user of the demo App
I Want to know which version of the token is used in the app
So That I can check the latest updates of the token with the reference version correspondance that is logged in the about page of the demo app

Issue 2

As a user of the documentation
I Want to know which version of the token is used in the library
So That I can check the latest updates of the token with the reference version correspondance that is logged in the documentation

Description

Add the token file version that is integrated in the demo app within the about page in a field:
"Token version: v1.0.0"

And add the token file version in the pages of the documentation that refer to the tokens