Add latest backend errors to cowswap

[W3stside]

Summary

Adds latest errors found in newest API spec from here: https://github.com/gnosis/gp-v2-services/blob/main/crates/orderbook/openapi.yml#L740

Screenshot:

TEST

1. XDAI chain
2. select 0xMR as in and XGTv2 as out
3. trade
4. should see insufficient liquidty error as opposed to Error try again later error

[github-actions]

• 🔭 GP Swap: Gnosis Protocol v2 Swap UI

[MareenG]

Works nicely.

[alfetopito]

Could you also do the one for buying ETH and sending it to a Smart Contract?

[elena-zh]

Could you also do the one for buying ETH and sending it to a Smart Contract?

To add: issue number #1612

[W3stside]

@alfetopito e478c22

no clue how to test it works tho, please let me know if it's ok

[anxolin]

Nice you add the blob. As a nitpick, I would also make a comment with something: See latest version and a link to their main branch file where they always have the latest

This way we can easily check if there's sth new

[elena-zh]

Seems that it works: at least, the explanation is much better than it was before.

[anxolin]

@W3stside should we include this one in 1.5 too?

[alfetopito]

@alfetopito e478c22

no clue how to test it works tho, please let me know if it's ok

Elena tested it already, but it's easy: Try to place and order with Gnosis Safe or add as recipient a SmartContract address

[anxolin]

@W3stside i just rebased your branch to 1.5 and merged, i hope is alright

[W3stside]

@anxolin all good was going to do the same, thanks