Export Zinnia as module

[juliangruber]

See filecoin-station/spark#2 (comment) for additional context.

Expose Zinnia as a module instead of a global:

import { Zinnia } from 'zinnia'

[bajtos]

@juliangruber I am leaning towards finer-grained modules.

import {walletAddress, activity} from 'zinnia:station';
import {peerId, requestProtocol} from 'zinnia:libp2p';

WDYT?

[juliangruber]

Initial thoughts: Having these fields non-namespaced will make it likely for there to be collisions with user variables. We can still expose this way, but then I guess a more common pattern would be to import with an asterisk:

import * as station from 'zinnia:station';
import * as libp2p from 'zinnia:libp2p';