encoding/json: Add Custom JSON Package with Build Tag Support for Sonic

[shazbert]

PR Description

This pull request introduces a custom JSON package located in encoding/json/ to facilitate swapping between the default Go encoding/json package and the sonic library based on build tags.

Adds:

• json.go (default implementation using encoding/json).
• sonic.go (alternative implementation using sonic library).

Import Updates:

All imports to the standard encoding/json package have been updated to the new custom package github.com/thrasher-corp/gocryptotrader/encoding/json.

Added basic benchmarks for both the default encoding/json and the sonic implementation to evaluate hot-swap performance.

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

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 1 line in your changes missing coverage. Please review.

Project coverage is 36.51%. Comparing base (cb6b342) to head (2f69362).

Files with missing lines	Patch %	Lines
cmd/exchange_wrapper_issues/main.go	0.00%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1623   +/-   ##
=======================================
  Coverage   36.50%   36.51%           
=======================================
  Files         414      414           
  Lines      179353   179353           
=======================================
+ Hits        65477    65487   +10     
+ Misses     106006   106004    -2     
+ Partials     7870     7862    -8     

Files with missing lines	Coverage Δ
backtester/btcli/main.go	0.00% <ø> (ø)
backtester/config/backtesterconfig.go	88.46% <ø> (ø)
backtester/config/strategyconfig.go	83.51% <ø> (ø)
backtester/config/strategyconfigbuilder/main.go	0.00% <ø> (ø)
backtester/eventhandlers/statistics/statistics.go	74.63% <ø> (ø)
backtester/main.go	0.00% <ø> (ø)
cmd/apichecker/apicheck.go	38.20% <ø> (+0.15%)	⬆️
cmd/config/config.go	8.62% <ø> (ø)
cmd/config_builder/builder.go	0.00% <ø> (ø)
cmd/documentation/documentation.go	0.00% <ø> (ø)
... and 92 more

... and 8 files with indirect coverage changes