[Feature] Copy button on code snippet

[dartpain]

Add copy button on code snippets

Should work and look similar to existing copy button next to the message

Should be visible next to code snippets here (where its underlined with yellow)

Should be visible on hover over the code snippet and act similarly to the copy button next to the message

[sossost]

Hello, @dartpain! I am sossost, a new contributor. Can I resolve this issue??