cli/__init__.py: catch a syntax error when re-compiling the target file

Author: shaggysa

pybricksdev/cli/__init__.py

@@ -351,6 +351,10 @@ async def reconnect_hub():
                         case _:
                             return
 
+                except SyntaxError as e:
+                    print("There was a syntax error in your file:")
+                    print(e, "\n")
+
                 except HubPowerButtonPressedError:
                     # This means the user pressed the button on the hub to re-start the
                     # current program, so the menu was canceled and we are now printing