feat(workflow): add option to checkout submodules in repo

Adds a new input to be able to checkout repos with submodules.

https://github.com/actions/checkout/blob/cbb722410c2e876e24abbe8de2cc27693e501dcb/README.md?plain=1#L117

actions/setup/action.yml

@@ -26,6 +26,10 @@ inputs:
     description: Number of commits to fetch. 0 indicates all history for all branches and tags.
     default: 0
 
+  checkout-submodules:
+    description: "Whether to checkout submodules: `true` to checkout submodules or `recursive` to recursively checkout submodules."
+    default: ''
+
 runs:
   using: composite
 
@@ -35,6 +39,7 @@ runs:
       with:
         # Needed for conventional commit linting.
         fetch-depth: ${{ inputs.fetch-depth }}
+        submodules: ${{ inputs.checkout-submodules }}
 
     - name: Set up Go
       uses: actions/setup-go@v5