feat: add support for partitioning .heic files

[Coniferish]

.heic files are an image filetype we have not supported.

Testing

from unstructured.partition.image import partition_image

png_filename = "example-docs/DA-1p.png"
heic_filename = "example-docs/DA-1p.heic"

png_elements = partition_image(png_filename, strategy="hi_res")
heic_elements = partition_image(heic_filename, strategy="hi_res")

for i in range(len(heic_elements)):
	print(heic_elements[i].text == png_elements[i].text)

[qued]

Wait for @awalker4 to chime in about the unstructured-client bump, and I just have the one concern about using a different Python version to pip-compile. Otherwise LGTM! Thanks for the quick win on this!

[christinestraub]

@Coniferish @qued I found that if we call register_heif_opener() before calling unstructured-inference functions, this PR works without making any changes to the unstructred-inference repo.

[christinestraub]

Can we move register_heif_opener() to partition_pdf_or_image() to get the "ocr_only" strategy work?

heic_elements = partition_image(heic_filename, strategy="ocr_only")

[christinestraub]

LGTM!