Action urls for controlling edna, capturing data into edna

[kjk]

Two use cases in mind:

• in docs it would be nice to have commands also be links that can trigger that command
• allow sending data to Edna for example allow sending content of clipboard to edna to store as a block or new note

For example an app could launch: https://edna.arslexis.io/cmd/capturetext?content=foo&type=text&modeHint=block|note

This would launch a capture dialog for options to append as block to current note, append to other note, create a new note etc.

Another example: https://edna.arslexis.io/cmd/opennote would launch note selector at startup.

Those urls could be in any page or created by an app (e.g. with autohotkey on Windows we could send clipboard to edna).

For that reason we need to be careful about always requiring user confirmation.

We can implement other commands.

We could additionally register a protocol handler e.g. edna: or web+edna: so that they are sent to locally installed PWA and not to the browser (I think that's how it works).