Feature Request: Share note outside of app

[dtrammell]

Problem: I frequently share things from within my Twitter app to people outside of the app via email, or Signal, or other apps on my phone. Amethyst does not have an external app share feature. Amethyst does not have a webapp interface, so there is nowhere for it to link to in order to reference posts.

Solution:

1. Add a configuration parameter for the user's favorite webapp Nostr client. I personally use Iris.to
2. Add a share entry in the three dots button at the bottom of each post that allows you to send some pre-formatted data to another app on the user's device, linking the note in the configured webapp's URI format for direct view of a note.

I frequently share Tweets in this manner via GMail, Signal, Slack, and Discord, but the Share option should really work with any app that the user can select from the device. Also provide a "Copy Link" option under the Share menu.