linters: Add modernise tool check and fix issues (#2012)

* linters: Add modernise tool check and fix issues

* engine: Simplify exch.SetDefaults call and remove localWG

* CI: Revert config versions lint workflow

docs/CODING_GUIDELINES.md

@@ -179,7 +179,7 @@ Run the following after completing changes:
 
 This ensures proper formatting across the codebase.
 
-## Linters
+## Linters and other miscellaneous checks
 
 Run the following to check for linting issues:
 
@@ -187,6 +187,14 @@ Run the following to check for linting issues:
     golangci-lint run ./... (or make lint)
 ```
 
+Run the following tool to check for Go modernise issues:
+
+```console
+    make modernise
+```
+
+Several other miscellaneous checks will be ran via [GitHub actions](/.github/workflows/misc.yml).
+
 - All lint warnings and errors must be resolved before merging.
 - Use `//nolint:linter-name` sparingly and always explain the reason in a comment next to the code.
 - Examples of valid use: