Tasks

1. Suppress notice in JSON mode

• 1.1 Add a silent option to maybeShowTelemetryNotice() that skips the notice and leaves noticeSeen unset
• 1.2 Read actionCommand.opts().json in the preAction hook and pass silent accordingly

2. Tests

• 2.1 Assert a first-run --json (silent) call prints nothing and does not mark the notice seen
• 2.2 Assert the disclosure still appears on the first later non-silent run