feat: accept command line argument to launch keeper in different modes

[zarboq]

Feature Request

Describe the Feature Request

We will most likely have two different types of keepers.

Two different type of keepers are needed. Liquidation Keepers and Order Keepers. Both keepers should first check if transactions will fail before sending them to save gas. Gas for keepers should be provided by user when he create his Order.

Order Keeper:

Those keeper will listen to event for Order, Withdraw and Deposit creation. When they get a new event they will check the viability of the action to execute and execute it if possible.

Liquidation Keeper:

Their role is to loop on open positions to check if they are liquidable and liquidate them if it’s the case.

That's why we need to accept different argument when launching our keeper through the command line.

Describe Preferred Solution

Add a keeper-mode argument to the CLI. For now the two values it should accept are order and liquidation.