The `@apply_metadata` decorator already contains logic to detect the
language of the element text (on either a document or element level).
Update pdfs, and later images, to use this decorator to get accurate
element language results outputted.
Test
```
from unstructured.partition.auto import partition
def test_partition_pdf():
pdf_path = "example-docs/language-docs/fr_olap.pdf"
elements = partition(pdf_path) # optionally set `detect_language_per_element=True)`
print(f"Number of elements partitioned: {len(elements)}")
# Check if elements are returned
assert len(elements) > 0, "No elements were partitioned from the PDF."
# check language outputted for each element
for element in elements:
print(element)
print(element.metadata.languages)
print("-------------------------------")
test_partition_pdf()
```
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Co-authored-by: ryannikolaidis <1208590+ryannikolaidis@users.noreply.github.com>
Co-authored-by: shreyanid <shreyanid@users.noreply.github.com>
