What are Flutter layouts and how to use them?

Flutter layout widgets:\n\n**Single child layouts:**\n• Container - Padding, margin, decoration\n• Center - Centers child widget\n• Align - Aligns child within parent\n• Padding - Adds padding around child\n\n**Multi-child layouts:**\n• Column - Vertical arrangement\n• Row - Horizontal arrangement\n• Stack - Overlapping widgets\n• Wrap - Wraps children to new line\n\n**Flexible layouts:**\n• Expanded - Takes available space\n• Flexible - Flexible space allocation\n• Flex - Custom flex layouts\n\n**Example:**\n\nColumn(\n children: [\n Text('Title'),\n Expanded(child: ListView(...)),\n ElevatedButton(...)\n ]\n)\n