- Restore install.sh (249 lines) from commit b8bcffb^ to scripts/ directory
- Update README.md to reference scripts/install.sh in installation instructions
- Fix 404 error for users following quick installation guide
The install.sh script was accidentally deleted in commit b8bcffb (2025-10-17)
during directory reorganization. This restores it to the new scripts/ directory
as intended by the reorganization.