add files from m63203. HEIF region items. Canon

[podborski]

Note that the contribution m63203 has more dumps that can be used to finalize this PR.

[cconcolato]

Reviewers needed.

[fmaze]

From discussion in GitHub#82 it would appear that at least the region-polygon.heic example is currently invalid.

The region-polygon.heic example has Item 2 -[cdsc]-> Item 100, and Item 100 -[cdsc]-> Item 1 where Item 1 and 2 are 'hvc1' and Item 100 is 'rgan'.

But, we should rather have Item 100 -[eroi]-> Item 2, and Item 100 -[cdsc]-> Item 1.

In 23008-12 2nd ed. clause 6.10.3, (and future update in latest draft of 23008-12 2nd ed. FDAM1 clause 11.3.1), it is stated that region item rgan is associated with:

• "metadata items, using an item reference of type 'cdsc' from the metadata item to the region item"
• "image items (...), using an item reference of type 'eroi' from the region item to the image item (...)"

[bradh]

There are definitely more examples in this PR where there is an [image] -[cdsc]-> [rgan item] reference. For example, the region-rectangle.heic appears the same.

[podborski]

This PR is replaced with #137