feat(inquirerer): add password input type with masked display

[pyramation]

Summary

Adds a new password question type to inquirerer that masks user input with asterisks (or a custom mask character) while typing. The actual input value is captured and returned on Enter.

Changes:

• New PasswordQuestion interface with optional mask property (defaults to *)
• New password() method in Inquirerer class following the same pattern as other interactive prompts
• Updated Question union type to include PasswordQuestion

Usage:

const answer = await prompter.prompt(argv, [
  {
    type: 'password',
    name: 'token',
    message: 'API Token',
    mask: '*', // optional, defaults to '*'
  },
]);

Review & Testing Checklist for Human

• Test interactive password entry - Run a prompt with type: 'password' and verify asterisks display while typing, and the actual value is returned
• Test backspace handling - Verify backspace removes characters correctly and updates the masked display
• Test special characters - The character set includes common symbols but may miss some edge cases (unicode, etc.)
• Verify non-interactive behavior - In noTty mode, the method returns null rather than reading from stdin

Recommended Test Plan:

1. Create a simple test script that prompts for a password
2. Type various characters including letters, numbers, and symbols
3. Use backspace to edit
4. Press Enter and verify the returned value matches what was typed

Notes

• No escape key handling is implemented - users cannot cancel the prompt mid-entry
• The character set is hardcoded and may not cover all possible input characters

Link to Devin run: https://app.devin.ai/sessions/041b1d6074a549febda2c95195f1e758
Requested by: Dan Lynch (@pyramation)

[devin-ai-integration]

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