chore(store): add Microsoft Store listing logo images

The Partner Center "Store display images" slots for Windows 10/11
customers — 300x300 / 150x150 / 71x71, downscaled from
src-tauri/icons/icon-source.png (1024x1024). These are optional listing
overrides; the Store falls back to the MSIX package logos otherwise.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: var-gg