Add full SHC card generation support to the app

This PR adds support for generating SHC cards from a variety of PDF and image inputs. Summary of changes:

There is now a separate SHC card design which is visually distinct from our current (to-be-deprecated) cards for ease of visual differentiation, and which handles multiple jurisdictions in a generic manner. It contains only the passholder's name to encourage scanning of the pass rather than just "trusting" the written data around the pass which remains easy to forge
Fixed SHC QR code generation in images - zxing library DOES NOT WORK for SHC QR codes, needed to change to nuintin/@qrcode so we could create QR codes in chunks as required by SHC
Received NS-related contributions from @corrmaan
Added support for SHC import from many image formats (thanks upstream!)
Added support for scanning all PDF pages for an SHC code
Simplified ON receipt detection algorithm
Removed a bunch of no-longer-needed Sentry PDF metadata collection (simplified PDF handling means we don't care about PDF metadata)
Added comments around the pieces which need to be turned off Oct. 22nd to stop pass generation
Added examples of decoded provincial and state SHCs for ease of reference and knowledge-sharing
Record unknown SHC metadata so that we can quickly detect and react to new jurisdictions

billylo1 / covidpass