Added some missing options

[GastonZalba]

Shared options

• videoStabilization
• colorEffect
• dynamicRange
• imageEffectMode
• statistics
• meteringMode
• flickerMode
• roi
• awbGains
• annotate
• annotateExtra

Still options

• raw
• quality
• thumbnail
• burst
• exif
• gpsExif

Added HQ Camera mode

[gregnr]

This is really great @GastonZalba! Thanks for your work on this, and sorry for the delay. I just a few DX things I would love to get your thoughts on before merging.

[GastonZalba]

Hi, excelent. I'm going to look at this and come back.

Another thing that would seem appropriate to do (i can make a separate PR) would be to move all the enums to a separate file and then reexport them from index.ts. So, the current behaviour would be the same, but it will allow to import only the enums (using something like pi-camera-connect/dist/@enums) from a frontend appplication (like react/electron) without requiring the entire library and preventing the fatal import errors from child_process and stream dependencies.

Sorry if my english is a bit broken.

[GastonZalba]

@gregnr changes applied. Let me know what you think about the previous enums suggestion (move them to a separate file).
I'm also working on enabling the preview window and arguments (fullscreen, preview, keypress and dispnum). I'll be back in a few days with that.

[GastonZalba]

@gregnr Hi, i finally added a few more options (annotate, exif and related), expanded a little the still test, and cleaned up some mess that i left after the last requested changes. In the README I also modified some values that I had set as "default" from null to undefined, which I understand is more correct (and added some missing info as well). Let me know if any further adjustment is needed