Add IPTC metadata support for tiff#2906
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mpospelova wants to merge 2 commits intoimage-rs:mainfrom
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This PR adds IPTC support for TIFF images.
An IRB reader was added to parse Tag 34377 and look for the IPTC block (ID 0x0404). It acts as a fallback when RichTIFFIPTC isn't there. It iterates through the blocks, checking the 8BIM signature and handling padding, without allocating extra memory