Add Documentation

[Sak1012]

This PR resolves #11 by adding documentation explaining exhibitors and event staff workflow

Summary by Sourcery

Add documentation for the CheckIn and Exhibitor workflows, providing detailed steps and images to guide event staff and exhibitors through their respective processes.

Documentation:

• Add documentation for the CheckIn workflow, detailing steps for event staff to authenticate devices, select events, perform check-ins, and generate badges.
• Add documentation for the Exhibitor workflow, outlining steps for exhibitors to authenticate devices, select events, perform lead scanning, and manage scanned leads.

[sourcery-ai[bot]]

Reviewer's Guide by Sourcery

This PR adds new documentation files that explain the workflows for exhibitors and check-in staff. The documentation includes step-by-step guides with screenshots for both user roles, detailing the process from login to their respective main functionalities.

No diagrams generated as the changes look simple and do not need a visual representation.

File-Level Changes

Change	Details	Files
Added documentation for check-in staff workflow	Documented login and device authentication process Added event selection instructions Detailed check-in process with camera usage Explained badge generation and printing workflow	docs/checkin.md
Added documentation for exhibitor workflow	Documented login and device authentication process Added event selection and auth key instructions Detailed lead scanning functionality Explained lead management features including tags and notes Added information about downloading leads as CSV	docs/exhibitor.md

Assessment against linked issues

Issue	Objective	Addressed	Explanation
#11	Add documentation for the Exhibitor workflow in the Checkin App	✅
#11	Add documentation for the Check-in workflow in the Checkin App	✅

Possibly linked issues

• #11: The PR adds documentation for both exhibitor and check-in workflows, directly addressing the issue's requirements.

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