cowboy credits (aka nov-5 (aka jan-3))

[huumn]

This is ready for review. It primarily just gets the important jobs done. Some of more involved things I've discussed like overhauling: settings, top stackers, satistics, etc are prohibitively involved, ie it's too much to change at once a priori like this, ie it's easy to bike shed myself on nonsense things.

TODO

• receive fee credits for zaps under x sats
  • test
• send fee credits when zapping under x sats
  • test
• non-p2p zaps/receives go to fee credits
  • test
  • we don't know if the sender has attached sending wallets, so we need a parameter in the mutation for them to tell us
  • make default behavior for receives: proxy, with a fallback to direct, which falls back to CCs
• buy fee credits
  • paid action
  • mutation
• wallet UI needs:
  • buy fee credits
  • withdrawal reward sats
    • test
  • attached wallet pages
• does satistics still make sense?
  • I've decided it makes enough sense to ship ... after a bunch of half-rewrites, I realized the "right" way will require a massive refactor akin to Remodel DB with paid actions at center? #1717 ... and it's not worth putting that hurdle up to this
  • we'll just change SATS in the final column to SATS/CCs
• remove p2p zap/invoice notifications
• zap notifications that list sats/credits
  • note: needs to be backwards compat (ie can't assume all old sat zaps are credits)
• invites need to use credits
  • should probably be a paid action
  • test
• item display (need update comments queries to gather these)
  • item.commentSats
  • item.commentCredits
  • item.sats
  • item.credits
  • item.meSats
  • item.meCredits
• user display
  • me.sats
  • me.credits
  • me.satsStacked punt
  • me.creditsStacked punt
• squash migrations

[ekzyis]

Looks good so far! Only looked through all the code and tested buying credits.

Left some questions.