refactor: unify --format option across all commands (inspect, sys) to use shared format_option()

Summary

winml inspect and winml sys have their own inline --format option definitions that predate the shared cli_utils.format_option() decorator introduced in #855. Unify them to use the shared decorator and OutputFormat type alias for consistency.

Commands to update

• winml inspect — currently uses click.Choice(["table", "json"]) with default "table"
• winml sys — currently uses click.Choice(["text", "json", "compact"]) with default "text"

Notes

• inspect uses "table" instead of "text" as its non-JSON default — consider whether to rename to "text" for consistency or extend OutputFormat to include "table".
• sys supports a third format "compact" — the shared decorator may need an optional extra_choices parameter, or sys can keep its own definition if the set of choices differs significantly.
• Update type annotations from str to OutputFormat (or extended variant).

Related

Follow-up to #855 which introduced the shared format_option() and OutputFormat type.

Start by reading the shared cli_utils.format_option() decorator and OutputFormat introduced in #855, then compare the existing --format definitions for winml inspect and winml sys. Done means both commands consistently use the shared option and appropriate type annotations, while their table/text, json, and compact choices are intentionally handled.