feat: rename `card get` to `card inspect`

[Tehsmash]

Problem

card get is misleading — the verb "get" implies a remote fetch, but the command works equally well with local file://... references where nothing is "gotten". The command's real purpose is displaying/inspecting the contents of an agent card, regardless of where it lives.

Proposal

Rename card get to card inspect (preferred) or card show.

Why inspect:

• Matches the mental model — you are inspecting a card's contents
• Consistent with other CLI tooling conventions (docker inspect, kubectl describe)
• Works equally well for remote URLs and local file:// references
• Avoids confusion with "fetching" or "downloading"

Implementation notes

• Rename the command in internal/cli/card_get.go (and the file itself)
• Update card.go subcommand registration
• Add a deprecated get alias pointing to inspect for backwards compatibility
• Update README / docs

References

• internal/cli/card_get.go — command implementation
• internal/cli/card.go — parent command registration

[msampathkumar]

I believe the initial idea of a2a card get was to fetch the Agent Card that is hosted remotely and display it locally. Much like wget command.

I feel card get and card show both looks good. Should we support both ?

[Tehsmash]

Supporting both even if its just an alias could be good compromise.

If we're thinking of a "wget" kind of usage should we have a -o file? Or just rely on unix pipelining for redirecting to a file.