Add Landscape Orientation Option for Answer Sheet Generation

Problem Statement Currently, answer sheets are restricted to portrait orientation. This limits layout efficiency when creating high-question-count sheets, wide multi-column assessments, or forms requiring broader answer blocks, resulting in cramped designs or unnecessary page overflow.

Proposed Solution Implement an orientation control (Portrait / Landscape) in the Answer Sheet settings prior to exporting or printing, allowing the system to dynamically reflow grid layouts to fit a horizontal format.

Acceptance Criteria

• Setting UI: Add a "Page Orientation" toggle or drop-down (Portrait vs. Landscape) in the answer sheet configuration modal before export.

• Layout Reflow: Automatically adjust columns, margins, and question grids to optimize page space when landscape orientation is selected.

• PDF & Print Support: Ensure exported PDFs and print previews render cleanly in landscape mode without clipping edges or misaligning content.

• Scanner Alignment: Retain all required optical alignment anchors and barcode/QR markers in valid, scannable positions regardless of orientation.