What's new dashboard

[apomalyn]

Implementing What's New dashboard.
You can find the details of the What's New API here.

Who has access at this dashboard?

Admin users only (App|ETS)

Details about the feature

The feature should offer:

• Get the news already available
• Get the news for a specific lang/version
• Add a new in all available language
• Update a specific new
• Delete a specific new

Additionale details

The PR closing this issue should have:

• All the points specified in the last section
• UI should be tested