chore: Add checkout submodules

[rbarker-dev]

Description

This pull request introduces support for configuring submodule checkout behavior in the repository's GitHub Actions workflows and composite action. The changes add a new checkout-submodules input, update documentation to reflect the new option, and ensure the value is correctly passed through workflow jobs and actions.

Support for submodule checkout in workflows and actions:

• Added a new checkout-submodules input to action.yml, allowing users to specify whether submodules should be fetched during checkout (true, false, or recursive).
• Updated the composite action to echo the value of checkout-submodules and to pass it to the actions/checkout step. [1] [2]
• Updated workflow jobs in .github/workflows/test.yml to set checkout-submodules: false where appropriate. [1] [2]

Documentation updates:

• Enhanced the README.md to document the new checkout-submodules input, including its description, default value, and options.

Related Issue(s)

Closes #16

[Copilot]

Pull request overview

This pull request adds support for checking out Git submodules in the GitHub Action workflow by introducing a new checkout-submodules input parameter. The change enables users to specify whether submodules should be fetched during the checkout process, with support for true, false, or recursive values.

Changes:

• Added checkout-submodules input parameter to the action configuration with a default value of false
• Updated checkout logging to display the submodules configuration value
• Modified the checkout step to pass the submodules parameter to the underlying actions/checkout action
• Updated documentation and test workflows to reflect the new parameter

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 1 comment.

File	Description
action.yml	Added checkout-submodules input definition, logging output, and parameter passing to checkout action
README.md	Added checkout-submodules parameter documentation to the Repository Checkout table
.github/workflows/test.yml	Added checkout-submodules: false to test workflows to exercise the new parameter

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[Copilot]

Pull request overview

Copilot reviewed 3 out of 3 changed files in this pull request and generated no new comments.

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