* Use custom relay API
Relay from nostr-tools was cumbersome to use. This custom abstraction over window.WebSocket makes interacting with nostr relays easier.
* Use variables for nostr message parts
* Fix NWC save
* Use try/finally
* Refactor crossposting code
* use custom replay API
* simplify callWithTimeout
* Use isomorphic-ws for nip57 zap receipts
* Use async map
* Reject with timeout error
* Move time functions into lib/time
* Remove outdated comment regarding relay.close()
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