feat(local): add kiac backend for Apple silicon clusters

[patrickleet]

Summary

• New hops local backend kiac (saiyam1814/kiac): Kubernetes nodes as lightweight VMs on apple/container (Apple silicon).
• Cluster name hops → kube context kiac-hops (kubeadm single-node).
• Registry wiring via containerd certs.d (same model as kind).
• When Mac cannot reach the node IP (vmnet / Local Network), hops starts hops-kiac-api-proxy on 127.0.0.1:16443 and rewrites kubeconfig.
• Documents apple/container 1.1.0 preference until kiac#14 (1.2.x sysctl ip_forward break).

Verified locally

• cargo test --bin hops-cli backend (40 tests)
• hops local start --backend kiac on this Mac: Crossplane + providers + HTTPS registry ready; context kiac-hops via localhost proxy.

Usage

# Prefer container 1.1.0 until kiac#14 is fixed
brew tap saiyam1814/tap && brew install saiyam1814/tap/kiac
hops local start --backend kiac
kubectl get nodes   # context kiac-hops

Test plan

• hops local install --backend kiac on a clean Mac
• hops local start --backend kiac (create + resume paths)
• hops local doctor --backend kiac
• hops local destroy --backend kiac
• Path config install if host can reach NodePort 30500

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📥 Commits

Reviewing files that changed from the base of the PR and between 78c0fef and dfbd2a0.

📒 Files selected for processing (4)

• README.md
• src/commands/local/backend/kiac.rs
• src/commands/local/backend/mod.rs
• src/commands/local/mod.rs

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