docs: schema first openapi by oapi-codegen

[incubator4]

Summary

1. change openapi.json to yaml
2. split openapi.yaml with single unti type define
3. suit code interface to implement generate code ServerInterface
4. protocol-go define schema mapping and internal schemas package struct mapping

description: The network on which activities occur.
example: ethereum
type: string
x-go-type: network.Network
x-go-type-import:
  path: github.com/rss3-network/protocol-go/schema/network

description: The platform on which activities occur.
example: Uniswap
type: string
x-go-type: decentralized.Platform
x-go-type-skip-optional-pointer: true
x-go-type-import:
  path: github.com/rss3-network/node/schema/worker/decentralized

6. Reuse openapi schema to reduce duplicate definitions and standardize naming
7. Fix schema and params defined in code but missing from openapi
8. Reduce create type, deletegating to generate.go, such as PostDecentralizedAccountsJSONBody
9. Reduce type checking and validation in http logic ( Delegating to generate.go)
10. Add server url from config.discovery.server.endpoint

Checklist

• The commit message follows Angular Contributing guidelines;
• Tests for the changes have been added (for bug fixes / features);

Does this PR introduce a breaking change?

• Yes
• No

Other information

Due to openapi official open api specification. rss path would not generate wildcard path which could match multi-level path. Therefore manually exclude from codegen and add it after generate.