Feature request: rtk wrapper for az aks (command invoke + get-credentials)

Real-world numbers from 30 days of Claude Code transcripts (686 sessions scanned, paired Bash tool_use → tool_result by tool_use_id):

Subcommand	Calls	Est. tokens	Avg/call
az aks command (invoke)	61	18,668	306
az aks get-credentials	81	16,072	198
(other az aks)	51	3,530	69
Total az aks	193	38,270	198

Two surprise findings vs my prior assumptions:

1. az aks command invoke is the largest bloat source — it streams full kubectl/helm output through, but the wrapper layer adds JSON envelope metadata (exitCode, properties.logs, properties.provisioningState) that's redundant when stdout already carries the result.
2. az aks get-credentials returns a multi-line warning prelude ("Merged 'X' as current context...", deprecation notices about kubelogin auth) on every call — ~200 tokens of noise per invocation, 81 invocations = ~16K tokens of pure preamble.

Suggested wrapper behavior:

• For az aks command invoke: strip the JSON envelope, emit only properties.logs to stdout (or pass-through with --rtk-raw)
• For az aks get-credentials: strip preamble, emit only the final Merged ... as current context line
• For az aks show: drop addonProfiles[] entries with enabled: false, drop agentPoolProfiles[].tags if empty

A generic ARM JSON pruner (filed separately as #1590) would cover ~30% of az aks show savings as a fallback. Happy to defer the show-side trimming until that lands.

Methodology note: numbers come from scanning ~/.claude/projects/**/*.jsonl transcripts, pairing Bash tool_use blocks with their tool_result by tool_use_id, stripping any rtk prefix to count like-for-like, and estimating tokens at 4 chars/token.