Add option for resources limits

[caputchinefrobles]

Adds the possibility to set container resource limits (jobs, deployments and pods).

[fdevans]

Thank you for this contribution! This is a well-implemented feature that adds resource limits support to complement the existing resource requests functionality.

What we like:

• Focused on a single, clear use case
• Follows the existing pattern for resources_requests consistently
• Non-breaking change (purely additive)
• Covers all relevant workflow steps (jobs, deployments, pods)

Before we can merge, we need:

1. Rebase on the latest master branch - This PR is from 2023 and there have been significant changes since then. Please rebase to ensure compatibility.

2. Documentation - Please add a section to the README explaining:

   • How to use resources_limits
   • The format (e.g., cpu=4,memory=1Gi)
   • An example showing both requests and limits together
   • Link to Kubernetes documentation on resource limits

3. Consider adding validation (optional) - While the existing resources_requests doesn't validate input either, it might be worth adding basic format validation to catch configuration errors early. This is optional and could be a separate PR.

Once you rebase and add documentation, we'd be happy to merge this!

Thanks for the contribution!