ergo-node-interface can't be used in async contexts

[ross-weir]

The library https://github.com/ergoplatform/ergo-node-interface-rust can't be used in async contexts which basically means we can't use it here. It likely needs a total re-write/re-factor to support both sync and async contexts: ergoplatform/ergo-node-interface-rust#19

Options:

• Try generate a client with openapi-generator or
  • https://github.com/oxidecomputer/progenitor
  • https://github.com/paperclip-rs/paperclip
• Manually start writing a new node api client
• Seems like it can also be worked around by spawning a new thread for each http request: https://stackoverflow.com/a/62536772 - not ideal but could be an easy unblocker until better solution implemented