afc_statistics: Web frontend

[earwig]

Have a webpage under http://tools.wmflabs.org/earwigbot/afc_statistics (perhaps) that displays the current chart dynamically so you don't have to go to WP:AFC/ST.

[earwig]

Further:

• [[Template:AFC statistics]] becomes a redirect, with the bot updating a chart at [[WP:AFC/S/L]].
• The new chart doesn't show declined, accepted, etc, just pending, limited to some realistic number like 1000 (perhaps randomly?). The webpage shows everything dynamically and is clearly linked from the new location in a header ([[WP:AFC/S/L/H]]?).
• The bot updates another header when there are problems, like replag that's too high.
• The new page has an option of filtering by note types, status, searching for submissions by submitter/etc.

This is partly by suggestion of @Technical-13.