ci: adds a GH action workflow file for F5 CLA automation

[TasoOneAsia]

Proposed Changes

Adds a GitHub action workflow file configured for F5 contributor license agreement automation and compliance. This action is configured to target a shared signature store for F5 Open Source projects. As part of the configuration, the following GitHub usernames were whitelisted as maintainers:

• 4141done
• dekobon

Any contributors not included in this whitelist will be asked to review the F5 CLA upon a pull request to the master main branch and to leave a comment agreeing to the terms before their contribution is merged.

Let me know if there are any other questions :)

[alessfg]

It just occured to me that we might want to update the contributing guide and PR template to note that F5 now requires a CLA. I'll work on it as soon as I get a chance.

[TasoOneAsia]

@alessfg feel free to reference my pr to f5/unovis which included changes to CONTRIBUTING.md. Though, looking back on that patch, there are definitely a couple missing commas.

[github-actions]

CLA Assistant Lite bot: 🎉 Thank you for your contribution. It appears you have not yet signed the F5 Contributor License Agreement (CLA), which is required for your changes to be incorporated into an F5 project. Please kindly read the F5 CLA and comment the following to agree:

---

I have hereby read the F5 CLA and agree to its terms

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1 out of 2 committers have signed the CLA.
✅ (TasoOneAsia)[https://github.com/TasoOneAsia]
❌ @alessfg
_{You can retrigger this bot by commenting recheck in this Pull Request}