TextInputModel class

Text input model for single-line or multi-line text entry.

Features:

• Character and word navigation
• Delete operations (character, word, line)
• Echo modes (normal, password, none)
• Suggestions/autocomplete
• Horizontal scrolling for long text (single-line mode)
• Soft-wrap with vertical scrolling (multi-line mode)
• Line navigation with up/down arrows (multi-line mode)
• Click-to-position cursor in multi-line mode
• Validation

Example:

final input = TextInputModel(
  prompt: 'Name: ',
  placeholder: 'Enter your name',
);

// Multi-line input
final editor = TextInputModel(
  multiline: true,
  width: 60,
  maxHeight: 10,
  prompt: '',
);