Shortcuts for modes

### Describe the feature or problem you'd like to solve

Shift tab can lead to occasional execution in wrong mode especially when cli has switched automatically. It can also be a bit clunky

### Proposed solution

Additional slash commands for autopilot and interactive as well as plan possibly combined with an option to disable shift tab altogether. Shorthands might also be nice (e.g. /p /a /i). Like most shortcuts it would benefit users by giving a simple in line mechanism and, for those that prefer them, get rid of the overhead of checking current mode and switching between them

### Example prompts or workflows

_No response_

### Additional context

_No response_