Vouch request: [grenkoca] (K8s resource allocation via user flag)

[grenkoca]

What do you want to work on?

I've modified sandbox creation to allows users to directly pass resource arguments via the openshell sandbox create api call. See: main...grenkoca:OpenShell:main

Hilariously, this didn't end up solving my original issue, but it seems to be working anyway so I might as well merge it.

(Original issue ended up being caused by running out of space on the drive with my Docker overlayfs),

Why this change?

The --resources flag closes a gap where users running memory/storage-intensive workloads had no way to raise (or explicitly limit) the Kubernetes resource limits on their sandbox containers from the CLI. Users can explicitly right-size their sandboxes at creation time without needing direct kubectl access to cluster. You can validate the changes by running the comands listed in the commit message, entering the openshell-cluster-openshell docker image, and listing resources for the pods

Checklist

• I wrote this request myself (not AI-generated)
• I have read CONTRIBUTING.md