Update application class to follow new framework architecture

[shuse2]

Description

• Update default application to return an object below, so that external library can use api as dependency.

interface DefaultApplication {
 app: Application;
 api: {
   token: xxx,
   dpos: xxx,
  ....
 }, 
}

• Update run function to accept genesis block as instance of Block.

Motivation

Update default application to return an object below, so that external library can use api as dependency.

With the new architecture, external module will need direct access to API for dependency with type. Therefore, we need to expose the default module api as well.

Update run function to accept genesis block as instance of Block.

Genesis block cannot be maintained in the memory. Therefore, it should be passed in the run phase, and only temporally used. (no assignment as variable). Also, receiving as instance will increase the flexibility of the genesis block format.

Additional Information

• this issue should be handle after Improve plugin and channel implementation #6612