Dummy REPL added as target option

[tmhglnd]

Hey! I added this dummy repl, it has no syntax highlighting and it just sends the code as osc-message /flok "code here" to port 3001 when connected to the flok-repl. It either forwards single line, codeblock, or whole code based on the shortkey pressed. Using the panic shortkey it sends /flok silence. I added some documentation about the target as well.

I think this addresses issue #68