[venus] 缺少对filplus相关功能查询

### 链服务模块 / Chain Service Components

- [X] venus
- [ ] venus-auth
- [ ] venus-gateway
- [ ] venus-messager
- [ ] venus-miner
- [ ] 文档 / docs

### 订单服务模块 / Deal Service Components

- [ ] venus-market
- [ ] 文档 / docs

### 算力服务模块 / Storage Power Service Components

- [ ] venus-sector-manager
- [ ] venus-worker
- [ ] 文档 / docs

### 描述 / Description

参考lotus filplus相关功能

```
NAME:
lotus filplus - Interact with the verified registry actor used by Filplus

USAGE:
lotus filplus command [command options] [arguments...]

COMMANDS:
grant-datacap give allowance to the specified verified client address
list-notaries list all notaries
list-clients list all verified clients
check-client-datacap check verified client remaining bytes
check-notary-datacap check a notary's remaining bytes
sign-remove-data-cap-proposal allows a notary to sign a Remove Data Cap Proposal
list-allocations List allocations made by client
remove-expired-allocations remove expired allocations (if no allocations are specified all eligible allocations are removed)
help, h Shows a list of commands or help for one command

OPTIONS:
--help, -h show help (default: false)
```