Rename icon files from mixed naming (big/16x16) to consistent size-based
names (large/small) for clarity. Update Go functions and variables to
reference the new asset names. This makes the icon pipeline easier to
understand and maintain.
File changes:
- gosentry-icon-big.png → gosentry-icon-large.png
- gosentry-icon-16x16.png → gosentry-icon-small.png
- gosentry-icon-16x16.ico → gosentry-icon-small.ico
- Embedded variable: iconBytes → iconLargeBytes for clarity
Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>