Add Node Service(swarm) to SDK

[s2quake]

Node

• Added the Node to run the Swarm for consensus.
• Added the IBlockChainService and the IReadChainService interfaces.
• Added the INodeService interface.

Grpc

• Added BlockChainGrpcService to get the various information of block chain.
• Added SeedGrpcService for seed service.

Options

• If a non-required property is not set in appsettings.json, the default value is set by the OptionsConfigurator.
• The OptionsValidator is then used to validate that the option is valid.

Dependency Injection

• Added the feature to ServiceCollection to find and automatically register the required services in the domain's assemblies without having to register the services manually.
• With attributes GrpcAttribute, OptionsAttribute and SingletonAttribute, they are automatically collected at application startup and registered with the service.

Data Annotations

• ValidationAttribute can be used to validate attributes used in options. This will provide the information needed to generate the schema for writing appsettings.json in the future.
• Currently, the following attributes are available
  • AddressAttribute
  • BoundPeerAttribute
  • DnsEndPointAttribute
  • PrivateKeyAttribute
  • PublicKeyAttribute

Extensions

• Added method extensions to the ServiceCollection class to make it easier to use Dependency Injection.