unstructured

b4d9ad81 - enhancement: detect headers in `partition_pdf` with fast strategy (#2455)

enhancement: detect headers in `partition_pdf` with fast strategy (#2455) ### Summary Detects headers and footers when using `partition_pdf` with the fast strategy. Identifies elements that are positioned in the top or bottom 5% of the page as headers or footers. If no coordinate information is available, an element won't be detected as a header or footer. --------- Co-authored-by: ryannikolaidis <1208590+ryannikolaidis@users.noreply.github.com> Co-authored-by: MthwRobinson <MthwRobinson@users.noreply.github.com>