Raindrop endpoint

[thenbe]

Raindrop allows users to export a single CSV file containing all items, but only through the GUI. There is no documented way to do the same through the Raindrop API.

When/if Raindrop exposes this functionality through a documented endpoint, we should look to use it. Only then can we stop using FZF_RAINDROP_COOKIE and instead use a bearer token like civilized folk.