Lite playground design changes (#7811)
* prevent new line on cmd+enter shortcut
* add copy button
* add download button
* better font sizing and align editor buttons
* button colors and header positioning
* add layout attribute
* height issue
* border fix
* overflow
* add changeset
* tests
* tweaks to index
* fix formatting in index.html
* fix event listener
* better alignment on header
* fix padding on code editor buttonsm
* add dark mode
* formatting
* fix heights issues
* add to guide
* shared worker and small fix
* Update guides/08_gradio-clients-and-lite/gradio-lite.md about SharedWorker mode (#7923)
* layout edit in guide
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Co-authored-by: gradio-pr-bot <gradio-pr-bot@users.noreply.github.com>
Co-authored-by: Abubakar Abid <abubakar@huggingface.co>
Co-authored-by: Yuichiro Tachibana (Tsuchiya) <t.yic.yt@gmail.com>
