➕ Add default values to roles

[bdsoha]

Proposed Changes

• Add default values to roles to refrain from missing values in the all.yml file.
• Allow modular use of roles when consumed as a collection.
• Add metadata to all roles with documented arguments.

Checklist

• Tested locally
• Ran site.yml playbook
• Ran reset.yml playbook
• Did not add any unnecessary changes
• Ran pre-commit install at least once before committing
• 🚀

[bdsoha]

@timothystewart6 It would be great to receive your input on whether or not such a PR is in the roadmap for this project.
If so, I will continue the work for all other roles.