docs: replace banner with sdk_apple.png

docs: replace banner with real PNG (sdk2.png)

docs: update On-Device Apple SDK banner (direct PNG asset)

docs: remove JPEG banner (replaced by PNG)

docs: add PNG On-Device Apple SDK banner

docs: use PNG On-Device Apple SDK banner

docs: add On-Device Apple SDK banner asset

docs: add On-Device Apple SDK banner

docs: publish Apple SDK model cards to main (sync with v1.1)

initial commit