Add Dex pallet (#407)

* Move pallet-asset-conversion

* update licensing

* initial integration

* Integrate Currency & Assets types

* integrate liquidity tokens

* fmt

* integrate dex pallet tests

* fmt

* compilation error fixes

* integrate dex benchmarks

* fmt

* cargo clippy

* replace all occurrences of "asset" with "coin"

* add the actual add liq/swap logic to in-instructions

* add client side & tests

* fix deny

* Lint and changes

- Renames InInstruction::AddLiquidity to InInstruction::SwapAndAddLiquidity
- Makes create_pool an internal function
- Makes dex-pallet exclusively create pools against a native coin
- Removes various fees
- Adds new crates to GH workflow

* Fix rebase artifacts

* Correct other rebase artifact

* Correct CI specification for liquidity-tokens

* Correct primitives' test to the standardized pallet account scheme

---------

Co-authored-by: Luke Parker <lukeparker5132@gmail.com>

processor/src/tests/substrate_signer.rs

@@ -42,7 +42,7 @@ async fn test_substrate_signer() {
         balance: Balance { coin: Coin::Bitcoin, amount: Amount(1000) },
       },
       InInstructionWithBalance {
-        instruction: InInstruction::Dex(Data::new(vec![0xcc; 128]).unwrap()),
+        instruction: InInstruction::Dex(DexCall::SwapAndAddLiquidity(SeraiAddress([0xbb; 32]))),
         balance: Balance { coin: Coin::Monero, amount: Amount(9999999999999999) },
       },
     ],