Add bindings for `VisualViewport` #2045

Job	Run time
Rustfmt	8s
Clippy	6m 47s
Verify that web-sys is compiled correctly	42s
Check	56s
Run js-sys crate tests	2m 21s
Run native tests	1m 44s
Run wasm-bindgen crate tests with multithreading enabled	1m 30s
Run wasm-bindgen crate tests (unix)	10m 49s
Run web-sys crate tests	7m 29s
Run wasm-bindgen-webidl crate tests	1m 56s
build_benchmarks	1m 2s
build_examples	3m 52s
build_nightly	1m 33s
dist_linux_x86_64_musl	2m 13s
dist_macos_aarch64	1m 23s
dist_linux_aarch64_gnu	2m 47s
dist_macos_x86_64	1m 6s
dist_windows	3m 38s
doc_api	1m 5s
doc_book	11s
Build and test the deno example	43s
Test TypeScript output of wasm-bindgen	1m 14s
Run UI compile-fail tests	40s
test_examples	1m 42s
deploy	48s
	58m 19s

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