Add SwitchListTile Widget to the Widget Catalog

[AryanKhubchandani]

SwitchListTile Widget needs to be added to the Widget Catalog. Read How to contribute to the Widget Catalog in the README for detailed steps. Make sure to include all the arguments(name, implementation, description, codeString, link and category). Refer to any widget in widgetList.dart and its own *widget*.dart file for better understanding. Showcase all properties including activeThumbImage, secondary, etc. (Refer to the official docs in case of any doubts) Please attach screen recording of the same once done in the PR.

[up4154]

can you assign this to me?

[AryanKhubchandani]

Sure, good luck!