Derive TWAP order filled %

[shoom3301]

We must display the filled % of TWAP order in the orders table, receipt modal, etc.

How to calculate the percent:

1. We know startTime of an order
2. Calling TWAP.getTradeableOrder and manipulating startTime we can generate all parts of TWAP order
3. Having all parts, we can generate their ids using computeOrderId
4. Having parts orders ids, we can request all necessary data from order-book and calculate values

TODO

• cowswap/src/modules/twap/const.ts

  Line 35 in 426668c

  // TODO: Add filled status

• https://github.com/cowprotocol/cowswap/blob/426668c9e405628753ead82cb67ce4429be168af/src/modules/twap/utils/emulateTwapAsOrder.ts

• cowswap/src/modules/twap/utils/emulateTwapAsOrder.ts

  Line 7 in 426668c

  // TODO: add FULFILLED status

[shoom3301]

This task can be implemented on the frontend side only theoretically.
If a TWAP order has >5 parts, it will create a significant load on order-book API and frontend