Support statistics feature for specific url

[silentsoft]

Motivation

Users may want to see the number of hits by date for a specific url that they created through a chart UI such as a dashboard.

This feature could lead users to visit their individual hits url via a hyperlink on the badge to see the details. e.g. https://hits.sh/foo.com/bar/.

Requires

• [x] DB table for specific urn and date not an entire hits.
  • [x] HITS_URNS_STATISTICS
• [x] JSON API for getting hits by date.
  • [x] GET /api/**/* e.g. /api/foo.com/bar
• [x] Routing pages for individual urls.
• [x] Link badge svg to that url when creating badge from index page.