Tracking issue: Pgwire Client(Frontend) API

[sunng87]

As we already have a solid backend API, I'm starting to build a client API with similar granularity with our current backend API. Hopefully with this API we will be able to build the proxy framework on top of pgwire.

Tasks:

• Tokio
  • [ ] Tokio client message codec
  • [ ] Tokio client
  • [ ] TLS client
  • [ ] connection management, reconnect
• API
  • [ ] startup api
    • [ ] authentication mechanisms
      • [ ] cleartext
      • [ ] to be added
  • [ ] request-response style apis
    • [ ] simple query
    • [ ] extended query
  • [ ] callback style apis
    • [ ] notification