[WIP] Stream reader

[glenn2223]

Added stream reading functionality - hope you can help @Redth 😁

WIP Reasons:

• ~Windows: not happy with using Skia - is there an alternative? Couldn't really find anything myself~ (see Improvements push)
• IOS/MAC: unable to test myself

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~Sidenote - android is very slow decoding (thought it was my code, but it wasn't) - see images. Windows completes the whole process in a little over a second.~
Edit: Improvements push has sped things up a little (letting Zxing choose format)

Old screengrabs

| Code timer | Android timer | | ------ | ------ | |  |  |

[glenn2223]

Hey @Redth, don't suppose you've had time to look at this?

[glenn2223]

Hey @Redth, me again, nudge, nudge... wink, wink 😁

[glenn2223]

If anyone can test this on IOS and mac then I can remove the draft 😁