feat: add button to copy transcript to clipboard#54

mehdichaouch wants to merge 1 commit intoxenova:experimental-webgpuxenova/whisper-web:experimental-webgpufrom

mehdichaouch:add-button-copy-to-clipboard-for-experimental-webgpumehdichaouch/whisper-web:add-button-copy-to-clipboard-for-experimental-webgpuCopy head branch name to clipboard