Add Board widget for absolute positioning #1543

Job	Run time
cargo check (aarch64-android)	29s
cargo check (msrv) (wasm32)	24s
cargo clippy (windows-latest)	2m 33s
cargo check (msrv) (windows-latest)	1m 59s
cargo clippy (wasm32)	1m 18s
cargo check (msrv) (macos-latest)	27s
cargo clippy (macos-latest)	1m 26s
cargo doc	1m 45s
cargo clippy (ubuntu-latest)	1m 46s
cargo check (msrv) (ubuntu-latest)	37s
formatting	30s
Prime LFS Cache	10s
cargo test (wasm32)	30s
typos	7s
cargo test (windows-latest)	3m 53s
cargo test (macos-latest)	2m 9s
cargo test (ubuntu-latest)	3m 46s
	23m 49s

Provide feedback