feat: Add custom XCM Weight Trader

[apopiak]

This PR adds:

• a hydradx-adapters crate to the warehouse that (for now) contains:
  • the custom XCM weight trader MultiCurrencyTrader
  • the struct ToFeeReceiver that implements TakeRevenue and channels it to pallet transaction multi payment's fee receiver
• a NativePriceOracle trait in hydradx-traits and an implementation in pallet multi-transaction-payment

based on #42

Todo:

• discarded the idea of a custom WeightToFee
  move from trait PriceOracle to a custom WeightToFee trait that can be parameterized on currencies.

[enthusiastmartin]

looks ok me.

you can actually merge the latest master - it will simplify as some of the changes were done as part of another Pr

[enthusiastmartin]

There is still some issue in the build ( clippy is complaining i believe)

lgtm when fixed and build passes

[apopiak]

There is still some issue in the build ( clippy is complaining i believe)

lgtm when fixed and build passes

I'm unsure how to fix the clippy error as it doesn't seem to be in our repo but in Polkadot?

[enthusiastmartin]

There is still some issue in the build ( clippy is complaining i believe)
lgtm when fixed and build passes

I'm unsure how to fix the clippy error as it doesn't seem to be in our repo but in Polkadot?

Fixed it for you for now.

it is due to the runtime-benchmarks features used in the repo.

and we run clippy with all-features.

[codecov]

Codecov Report

Merging #48 (d8b214d) into main (4276029) will decrease coverage by 0.39%.
The diff coverage is 70.31%.

@@            Coverage Diff             @@
##             main      #48      +/-   ##
==========================================
- Coverage   76.70%   76.31%   -0.40%     
==========================================
  Files          16       17       +1     
  Lines         983     1047      +64     
==========================================
+ Hits          754      799      +45     
- Misses        229      248      +19     

Impacted Files	Coverage Δ
transaction-multi-payment/src/lib.rs	66.83% <0.00%> (-0.69%)	⬇️
adapters/src/lib.rs	72.58% <72.58%> (ø)

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