clio should have a generic panic recovery function

**What would you like to be added**:

A Clio CLI, when it encounters a panic, should recover and print out the stack trace in good order, get the terminal out of raw mode, tear down any TUI as far as possible, and explain to the user to have a bug report.

I think this would require adding a parameter like "bugReportURL" to the App constructor, and then clio could template out a nice panic / recovery screen.

**Why is this needed**:

Right now, when apps using Clio panic, the TUI isn't torn down and the tty is left in raw mode, leaving the user to figure out what to do with a broken-looking terminal and a weirdly indented stack trace.

**Additional context**:

No files, tests, or entry points are named. Start by locating the App constructor and existing TUI, terminal-lifecycle, and panic-handling paths; done means panics produce an orderly stack trace, restore the terminal, tear down the TUI as far as possible, and show bug-report guidance.

Written by the indexing model from the issue text.