Plausible analytics date range

[hectorcorrea]

Adjust code to fetch analytics from launch (instead of only the last 12 months)

This is an example of a record that has pageviews older than 12 months and that show that the new parameter picks the correct totals:

12mo
{"results":[{"pageviews":1,"visitors":1,"filename":"(none)"}]}

custom&date=2021-01-01,2024-03-13
{"results":[{"pageviews":19,"visitors":13,"filename":"(none)"}]}

Closes #568