[Feature Request] Add runtime toggle for dontAsk permission mode

Question

**Bug Description**
There's no way to activate the dontAsk permission mode from within a session, even though that would come in quite handy. To add insult to injury, once you've cycled away from it via Shift-Tab, there's no way to get it back other than re-starting the cli. It's completely unclear how to use it from the VS Code extension.

If you don't want to add it to the Shift+Tab cycle for whatever mysterious reasons you might have, please add at least a `/permission-mode` command or simil