Add copy buttons to prompt and response outputs

[DavidSouther]

Here's an example of how changing the prompt can affect the output from a language model when asking it to "make a sandwich": ...

{
	"system": [
		"<role>You are a software engineer developing a tool to teach non-technical people how prompt engineering affects LLM outputs.</role>"
	],
	"user": "Make a sandwich"
}