feat: add support for gpt 5.4 native computer use#1792

Kylejeong2 wants to merge 2 commits intomainbrowserbase/stagehand:mainfrom

kylejeong/stg-1521-add-gpt-54-cua-supportbrowserbase/stagehand:kylejeong/stg-1521-add-gpt-54-cua-supportCopy head branch name to clipboard