xilem_web: Add `Rotate` and `Scale` (CSS) transform views #1639

Job	Run time
cargo clippy (windows-latest)	3m 44s
cargo check (msrv) (wasm32)	25s
cargo check (msrv) (windows-latest)	1m 40s
cargo clippy (macos-latest)	2m 19s
cargo check (aarch64-android)	22s
cargo check (msrv) (macos-latest)	26s
cargo clippy (ubuntu-latest)	1m 50s
cargo check (msrv) (ubuntu-latest)	31s
cargo clippy (wasm32)	1m 19s
cargo doc	1m 24s
Prime LFS Cache	14s
formatting	31s
cargo test (wasm32)	37s
typos	6s
cargo test (windows-latest)	2m 47s
cargo test (macos-latest)	1m 21s
cargo test (ubuntu-latest)	4m 41s
	24m 17s

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