Migrate code to MSAL since ADAL was archived

[oanalavinia]

As stated on #25 (comment) , the Microsoft Azure Active Directory Authentication Library (ADAL) for Java used in the application code base was archived starting with 5 july 2023 https://github.com/AzureAD/azure-activedirectory-library-for-java and we have to move to the new MSAL library

This will also mean refactoring the existing code and moving it to java, in a dedicated API module (right now it's written in groovy in wiki pages)

There shouldn't be any functionalities altered during this migration

[polx]

I am surprised that this product is still alive. I thought it was to be replaced by the Azure code.
I strongly recommend against using MS-specific libraries and recommend to prefer third-parties.