As a user, I want to see the result of the ocr processed image

[mstockerl]

1. Implement Firebase CloudFunction, which:

• Triggers, when new image is uploaded to Firebase Storage
• Use Google Vision Client to run OCR on image
• Extract license plate number
• Store result in Firestore

2. Listen in /annotate view for result

• Listen to updated Firestore entry annotate view
• Update state of view to display result

Recommended reading:

• Cloud Storage Triggers
• Vision Client documentation
• Write data in Firestore
• Realtime updates from Firestore