FancyZones and Shortcut Guide initial commit

Co-authored-by: Alexis Campailla <alexis@janeasystems.com>
Co-authored-by: Bret Anderson <bretan@microsoft.com>
Co-authored-by: Enrico Giordani <enrico.giordani@gmail.com>
Co-authored-by: Jaime Bernardo <jaime@janeasystems.com>
Co-authored-by: Jeff Bogdan <jeffbog@microsoft.com>
Co-authored-by: March Rogers <marchr@microsoft.com>
Co-authored-by: Mike Harsh <mharsh@microsoft.com>
Co-authored-by: Nachum Bundak <Nachum.Bundak@microsoft.com>
Co-authored-by: Oliver Jones <ojones@microsoft.com>
Co-authored-by: Patrick Little <plittle@microsoft.com>

src/runner/README.md

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+# PowerToys Runner
+
+# Introduction
+
+The PowerToys Runner contains the project for the PowerToys.exe executable.
+It's responsible for:
+- Loading the individual PowerToys modules.
+- Passing registered events to the PowerToys.
+- Showing a system tray icon to manage the PowerToys.
+- Bridging between the PowerToys modules and the Settings editor.
+
+![Image of the tray icon](/doc/images/runner/tray.png)
+
+# Code organization
+
+#### [`main.cpp`](./main.cpp)
+Contains the executable starting point, initialization code and the list of known PowerToys.
+
+#### [`powertoy_module.h`](./powertoy_module.h) and [`powertoy_module.cpp`](./powertoy_module.cpp)
+Contains code for initializing and managing the PowerToy modules.
+
+#### [`powertoys_events.cpp`](./powertoys_events.cpp)
+Contains code that handles the various events listeners, and forwards those events to the PowerToys modules.
+
+#### [`lowlevel_keyboard_event.cpp`](./lowlevel_keyboard_event.cpp)
+Contains code for registering the low level keyboard event hook that listens for keyboard events.
+
+#### [`win_hook_event.cpp`](./win_hook_event.cpp)
+Contains code for registering a Windows event hook through `SetWinEventHook`, that listens for various events raised when a window is interacted with.
+
+#### [`tray_icon.cpp`](./tray_icon.cpp)
+Contains code for managing the PowerToys tray icon and its menu commands.
+
+#### [`settings_window.cpp`](./settings_window.cpp)
+Contains code for starting the PowerToys settings window and communicating with it.
+
+#### [`general_settings.cpp`](./general_settings.cpp)
+Contains code for loading, saving and applying the general setings.
+
+#### [`auto_start_helper.cpp`](./auto_start_helper.cpp)
+Contains helper code for registering and unregistering PowerToys to run when the user logs in.
+
+#### [`unhandled_exception_handler.cpp`](./unhandled_exception_handler.cpp)
+Contains helper code to get stack traces in builds. Can be used by adding a call to `init_global_error_handlers` in [`WinMain`](./main.cpp).
+
+#### [`trace.cpp`](./trace.cpp)
+Contains code for telemetry.
+
+#### [`svgs`](./svgs/)
+Contains the SVG assets used by the PowerToys modules.