Begin implementing a Server

[ecton]

Initial server requirements:

• Ability to register one or more schemas as available to use.
• APIs exposed over QUIC for:
  • Add/Delete/List databases
  • List available schemas
  • Executing all Connection related queries
• Creating a database should initialize a new subfolder in the data folder.
• Server, for now, will keep all databases open. The use case for Cosmic Verge is a fixed number of databases per server. For large numbers of databases, Add configuration to Server to limit number of open databases. #27 will address that.
• Expose a command line executable that's easy to wrap. Maybe a macro_rules macro to create a main entrypoint for you.
• Command line executable needs to have:
  • Serve
  • Server data folder initialization (cert generation)