currency/exchanges: Add bespoke exchange translator and pair matching helper

[shazbert]

PR Description

• Adds translator helpers for specific currency matching operations that are bespoke to each exchange. This can be overridden client side and implemented ad-hoc but a hardcoded pass when needed can be introduced as is done with Kukoin, bybit & GateIO.

Thanks.

Type of change

Please delete options that are not relevant and add an x in [] as item is complete.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

How has this been tested

Please describe the tests that you ran to verify your changes. Provide instructions so we can reproduce. Please also list any relevant details for your test configuration and
also consider improving test coverage whilst working on a certain feature or package.

• go test ./... -race
• golangci-lint run
• Test X

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation and regenerated documentation via the documentation tool
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally and on Github Actions with my changes
• Any dependent changes have been merged and published in downstream modules

[gloriousCode]

Cool concept

[codecov]

Codecov Report

Attention: Patch coverage is 92.40506% with 6 lines in your changes missing coverage. Please review.

Project coverage is 36.36%. Comparing base (90fee94) to head (59d6192).
Report is 19 commits behind head on master.

Files	Patch %	Lines
currency/translation.go	91.42%	2 Missing and 1 partial ⚠️
exchanges/okx/okx_wrapper.go	62.50%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1556      +/-   ##
==========================================
+ Coverage   36.29%   36.36%   +0.06%     
==========================================
  Files         420      422       +2     
  Lines      183150   183117      -33     
==========================================
+ Hits        66482    66592     +110     
+ Misses     108605   108477     -128     
+ Partials     8063     8048      -15     

Files	Coverage Δ
currency/code_types.go	0.00% <ø> (ø)
exchanges/bybit/bybit_wrapper.go	43.20% <100.00%> (+2.54%)	⬆️
exchanges/gateio/gateio_wrapper.go	39.68% <100.00%> (+0.09%)	⬆️
exchanges/kucoin/kucoin_wrapper.go	34.79% <100.00%> (-0.23%)	⬇️
exchanges/okx/okx.go	20.10% <100.00%> (+0.08%)	⬆️
exchanges/okx/okx_types.go	40.44% <ø> (ø)
currency/translation.go	92.68% <91.42%> (-7.32%)	⬇️
exchanges/okx/okx_wrapper.go	30.89% <62.50%> (+0.02%)	⬆️

... and 43 files with indirect coverage changes

[gloriousCode]

tACKeroo

[thrasher-]

Just some consistency issues with mix and matching between assert and Go's native tester

Also with this change, we could potentially rid the need for Kraken's asset translator

[thrasher-]

Nice stuff!