Code review & refactoring + Documentation.

See merge request !3

Add a "download to CSV" button in case of network/communication loss with remote google sheet file.

Closes #6

See merge request !2

MVP: This is the first somewhat complete version of the project.

Closes #1

See merge request !1

Instead of searching for the next available empty column (which creates an infinite list of timestamps), the script now targets Column 7 (Column G) specifically. It will overwrite this cell every time a student scans their card after the initial entry

implemented batch syncs with google sheets through our service, updated the UI to match the application state and give real time feedback.