docd: update contributing guides with go.mod and lint work

docs/contributing.md

@@ -8,5 +8,9 @@
     * follow the style, naming and structure conventions of the rest of the project.
     * make commits atomic and easy to merge.
     * when updating documentation, please see [our guidance for documentation contributions](contributing_docs.md).
-    * apply format running `go fmt`, or the shell script `./scripts/checks.sh`
+    * when updating the `go.mod` file, please run `make tidy-all` to ensure all modules are updated. Please be aware that the lint stage could fail if this is not done.
+    * apply format running `make lint`
+        * For examples: `make -C examples lint`
+        * For modules: `make -C modules lint`
     * verify all tests are passing. Build and test the project with `make test-all` to do this.
+        * For a given module or example, go to the module or example directory and run `make test`.