feat/PN-11564 - Whole page component to manage the empty state

[mflauti]

Short description

Shows a Whole page component to manage the empty state when filtering by a certain range of dates returns no data

List of changes proposed in this pull request

• add a boolean 'isEmpty' field to StatisticsParsedResponse model to immediately signal there's no significant response data
• change Statistics.page to show the whole page component if isEmpty is true
• change the text showed as description when filtering by dates returns an empty result

How to test

• Go to Sender Dashboard, filter using a narrow dates range to force an empty data response and verify the behaviour is as described by the linked task