Create documentation for VITO mosaics

[JanssenBrm]

As the VITO worldcover mosaics are added to the ecosystem, it is important to also include the information in the documentation:

• [x] Provide a general description of the data sets
• [x] Provide a guide to the WorldCover website for more information
• [x] Add a link to the catalogue

[Pratichhya]

@JanssenBrm I assume it is completed and related to this ? In that case, can I close the ticket?

[JanssenBrm]

Correct, if the content is working and correct, the ticket can be closed.