CI

Add a `widgets` module and a default theme #250

Sign in to view logs

Run time

Learn about OS pricing on GitHub Actions

Job	Run time
Rustfmt	8s
Clippy on macos-latest	54s
Clippy on ubuntu-latest	1m 27s
Clippy on windows-latest	2m 51s
Rust on ${{ matrix.os }}	1s
	5m 21s