icon_data library
Lets patches construct IconData.
Not part of knowa_sdk.dart, on purpose: an app whose compiled code
constructs IconData at run time cannot be built in release mode with
icon tree-shaking, which is Flutter's default. Only the bridge registry
knowa release generates imports this, and only while it builds the app
with --no-tree-shake-icons. Anything else built from the same source
tree-shakes icons as usual.