Unify all trading events into the one generic one

[mrq1911]

Swapped { 
    who: AccountId, 
    pool: PoolType, 
    operation: ( Buy | Sell ), 
    asset_in: AssetId, 
    asset_out: AssetId, 
    amount_in: Balance, 
    amount_out: Balance,
    fee_rate: Permill
    batch: Option<u256> 
}

batch is nonce that router is setting on start of execution and resetting to None after

add all trading events in the Omnipool, Stableswap, XYK & OTC with this one depreciate all the old trading related fees (will be removed in future)

[jak-pan]

We should probably include fee as part of this

[jak-pan]

related to https://github.com/galacticcouncil/Basilisk-node/issues/469

[jak-pan]

Add id if the tx was fired from router

[jak-pan]

Swapped { 
    who: AccountId, 
    pool: PoolType, 
    operation: ( Buy | Sell ), 
    asset_in: AssetId, 
    asset_out: AssetId, 
    amount_in: Balance, 
    amount_out: Balance,
    fee_rate: Permill
    batch: Option<u256> 
}

batch is nonce that router is setting on start of execution and resetting to None after

add all trading events in the Omnipool, Stableswap, XYK & OTC with this one depreciate all the old trading related fees (will be removed in future)

I am using swap_type: exact_in || exact_out instead of buy | sell + flag partial : bool when user indicated he is ok with partial execution + it doesn't need to be pool - we can have OTC or off chain matched swaps. So I would maybe suggest firing name of the function called in operation. I.E. XYKSell | XYKBuy or just keep the area e.g. XYK | Omnipool. + I would add some kind of id. I see batch nonce is this unique in any way?

[jak-pan]

I'm experimenting with some unique swap id for off chain solving as we will probably want to be able to accept multiple non-ordered swaps from one person to be executed once the conditions match. I would probably like to see this info. We will however need to add this to all swap calls to retain this.