fix uncaught `BdbQuit` exceptions on ipdb `exit`

- `BdbQuit` is now handled in the top-most scope of `InteractiveShell.run_code`. This ensures that `BdbQuit` is correctly handled but can still do its job of breaking out of all user code/loops/further breakpoint requests. Hopefully will work better than previous attempts, which put the `BdqQuit` handling in `Pdb.set_trace`

- fixes:
  - jupyterlab/jupyterlab#12501

- refs:
  - ipython/ipython#876
  - ipython/ipython#1273
  - ipython/ipython#4474
  - ipython/ipython#5306
  - ipython/ipython#9731
  - ipython/ipython#9942
  - ipython/ipython#9950
  - ipython/ipython#10006
  - ipython/ipython#12378

.gitignore

@@ -28,5 +28,13 b' __pycache__'
 .pytest_cache
 .python-version
 venv*/
-.idea/
 .mypy_cache/
+
+# jetbrains ide stuff
+*.iml
+.idea/
+
+# vscode ide stuff
+*.code-workspace
+.history
+.vscode

IPython/core/debugger.py

@@ -101,7 +101,6 b' All the changes since then are under the same license as IPython.'
 #
 #*****************************************************************************
 
-import bdb
 import inspect
 import linecache
 import sys

IPython/core/interactiveshell.py

@@ -14,6 +14,7 b''
 import abc
 import ast
 import atexit
+import bdb
 import builtins as builtin_mod
 import dis
 import functools
@@ -3403,6 +3404,11 b' class InteractiveShell(SingletonConfigurable):'
                 result.error_in_exec = e
             self.showtraceback(exception_only=True)
             warn("To exit: use 'exit', 'quit', or Ctrl-D.", stacklevel=1)
+        except bdb.BdbQuit:
+            etype, value, tb = sys.exc_info()
+            if result is not None:
+                result.error_in_exec = value
+            # the BdbQuit stops here
         except self.custom_exceptions:
             etype, value, tb = sys.exc_info()
             if result is not None: