Add another page to vgwort admin section to display information from VG Wort so administrators can do a health check

The info that is available according to https://tom.vgwort.de/Documents/pdfs/dokumentation/metis/DOC_Verlagsmeld...

3.8 Quality Check
The publisher can see whether the process has been correctly completed. Therefore VG WORT offers
a quality check tool. Two general pieces of data are made available:
- Number of counter IDs ordered (updated daily)
- Number of counter IDs counted – total (approximately 4 day delayed)
- Number of counter IDs counted - free access (approximately 4 day delayed)
- Number of counter IDs counted – behind paywall (approximately 4 day delayed)
Furthermore the following data can be viewed for each calendar month (for the last 12 months):
- Number of counter IDs ordered (up to and including the month in question)
- Number of counter IDs counted – total (up to and including the month in question)
- Number of counter IDs counted – free access (up to and including the month in question)
- Number of counter IDs counted – behind paywall (up to and including the month in question)
- Number of counter IDs which are likely to reach the minimum visits for the current year - total
- Number of counter IDs which are likely to reach the minimum visits for the current year – free
access
- Number of counter IDs which are likely to reach the minimum visits for the current year –
behind paywall
- Number of counter IDs which are likely to reach the minimum visits, but which have not had a
notification sent yet – total.
- Number of counter IDs which are likely to reach the minimum visits, but which have not had a
notification sent yet – free access.
- Number of counter IDs which are likely to reach the minimum visits, but which have not had a
notification sent yet – behind paywall.