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/modules/README.md

@@ -0,0 +1,18 @@
+# PowerToys Modules
+
+The source code of the PowerToys modules:
+
+#### [`example_powertoy`](./example_powertoy)
+An example PowerToy, that demonstrates how to create new ones.
+
+#### [`fancyzones`](./fancyzones)
+The FancyZones PowerToy that alows users to create custom zones on the screen, to which the windows will snap when moved. 
+
+#### [`FancyZonesEditor`](./FancyZonesEditor)
+Editor for the snap-zones of the FancyZones PowerToy.
+
+#### [`interface`](./interface)
+Definition of the interface used by the [`runner`](/src/runner) to manage the PowerToys. All PowerToys must implement this interface.
+
+#### [`shortcut_guide`](./shorcut_guide)
+The Windows Shortcut Guide, displayed when the WinKey is held for some time.