Excecute CLI commands from TUI

[ihabunek]

From Mastodon DM:

hi, I wanted to ask if you could add something like a command line (prompt? the thing sitting below in vim) to toot tui to allow people to execute commands equivalent to toot [..] from command line. That way one could easily use things like ":toot follow stranger" and such. Another nice thing would be to have a refresh command to load new toots in the tui.