fix(kubectl): compact get pods and services aliases

[pagarsky]

Summary

• Route rtk kubectl get pods / get services aliases through the existing compact pod and service filters.
• Preserve raw kubectl passthrough for unsupported resources and explicit output/detail/watch flags such as -o name or --watch.
• Add unit coverage for the new get parser path and kubectl resource alias routing.

Context

RTK's hook already rewrites kubectl get pods to rtk kubectl get pods, but that form currently falls through to raw kubectl output instead of using the compact pod/service filters. This made rtk gain show little or no savings for kubectl-heavy sessions, even though kubectl is listed as a supported infrastructure command.

This PR keeps the existing rewrite shape and makes rtk kubectl get pods / get services use the same compact filters as rtk kubectl pods / services. Explicit output/detail flags like -o name still pass through raw kubectl output.

Test plan

• cargo fmt --all -- --check
• cargo clippy --all-targets -- -D unsafe_code
• cargo test --all
• Manual testing: ./target/debug/rtk kubectl get pods, ./target/debug/rtk kubectl get svc, ./target/debug/rtk kubectl get pods -o name

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