Add section on how to spawn vim from a ratatui application

[kdheepak]

• You need to disable_raw_mode and exit alternate screen
• You need to pause the event loop (if you have one) that handles any key or mouse events
• You can then spawn vim
• Once vim returns after wait(), you'll need to resume the event loop (if you have one)
• You'll need to enable_raw_mode and enter alternate screen again.

Example of how to do this with an async event loop:

https://github.com/ratatui-org/templates/blob/b75771463c00088b75e90986979c60720d024bbf/component/template/src/tui.rs#L171-L198

[Valentin271]

I believe this should be about the same for any other TUI: lazygit, yazi, even bash.

Also one important thing to note, this is about spawning a program and gaining back control. Which is different (and somewhat harder) than spawning a program on end.

Otherwise +1 for this.

[kdheepak]

Related: kdheepak/taskwarrior-tui#46