Update binding output for KV when creating new namespace

[harshil1712]

What versions & operating system are you using?

Wrangler 4.19.1, node 22.14.0

Please provide a link to a minimal reproduction

No response

Describe the Bug

When creating a new KV namespace with the --preview flag, the output doesn't show id in the bindings.
If a user copies the returned output in the Wrangler file, and run the project, they will get an error:

- "kv_namespaces[0]" bindings should have a string "id" field but got
  {"binding":"TODOS","preview_id":"<ID>"}.

We should also return an ID so that the user has correct bindings in their Wrangler file.

Please provide any relevant error logs

• "kv_namespaces[0]" bindings should have a string "id" field but got
  {"binding":"TODOS","preview_id":""}.