Clipboard hotkeys

Adding hotkeys to copy responses to the clipboard would be very useful. Ideally with the same hotkeys people are already used to, e.g. from ChatGPT: - `Ctrl + Shift + C` Copy last response to clipboard - `Ctrl + Shift + ;` Copy last code block to clipboard Getting this to work cross-platform should be fairly simple using something like [`pyperclip`](https://github.com/asweigart/pyperclip) ```python import pyperclip pyperclip.copy('The text to be copied to the clipboard.') ```