feat: add paper_size in SceneInfo

[Seb-sti1]

As discussed in #39, #34 (comment) and #34 (comment) there is a new property in SceneInfo called paperSize according to the debug output of remarkable software

I changed the test_blocks_keep_unknown_data_in_main_block as suggested by the comment. As it is in hex and a bit hard to read, here is an explanation of the modification made :

hex	signification	modifications
2E000000 0000010D	block definition	21 to 2E as the size of the SceneInfo is now 46 and not 33
1C 06000000 1F 0000 2F 0000	current_layer property	None
2C 05000000 1F 0000 21 01	background_visible property	None
3C 05000000 1F 0000 21 01	root_document_visible property	None
5C 08000000 7C050000 50070000	(new) paper_size property	Added as suggested by the comment
E1 FF	new, unknown data	None

I used the excess bytes 92, 8, 0, 0, 0, 124, 5, 0, 0, 80, 7, 0, 0 of #34 (comment)

Closes #39

[Azeirah]

@ricklupton @Seb-sti1 @ChenghaoMou Is there anything missing in here before this can be merged? I think it would be really nice to close the open PRs one by one. I can make time not this week, but the week after I'll have a sprint of two weeks to work on Scrybble, so I can take a look at all open PRs in rmscene and rmc?

Would be great to solve all the tiny lingering issues that are present currently, and especially to get proper color output at the end of the line.

[Seb-sti1]

I don't believe there is anything missing on #41 #42 #45, they can be merged whenever it's possible :)

[ricklupton]

Thanks for this @Seb-sti1, and @Azeirah for following up