Chama Service v0.1

[okjodom]

Scope: Build a group (chama) savings service with support for spend conditions of the sats. This service should expect and integrate with a generic Swap Service, with which it can execute on/offramps. Chama service should also allow for "templates", a model by which different group savings can be built on the same base service

Milestones

• define chama api
  • rpc service api : uses gRPC
  • rest api: proxies the rpc api
• define generic chama tempate model
  • implement a simple template model
  • allow extensibility of templates
• package docker image for chama service
• document api and usage