Add setting to show full pasted text in input instead of "pasted text" placeholder

When pasting long text (roughly >4 lines) into the interactive CLI input, Claude Code collapses it into a "pasted text" placeholder. The actual content is only visible after submitting with Enter.

This makes it difficult to verify what was pasted before sending, especially when pasting code snippets or error logs that need review.

Request: Add a configuration option (e.g. in settings.json) to always display the full pasted text inline instead of collapsing it.

Current behavior:

• Paste long text → see "pasted text" placeholder
• Content only visible after pressing Enter

Desired behavior (opt-in):

• A setting like "showFullPastedText": true that displays the full pasted content in the input area before submission