Add bindings for `UserActivation` #1583

Job	Run time
build_examples	3m 41s
Check	1m 5s
build_nightly	1m 49s
build_benchmarks	58s
Verify that web-sys is compiled correctly	54s
Clippy	5m 22s
dist_linux_aarch64_gnu	3m 12s
dist_linux_x86_64_musl	2m 30s
dist_macos_aarch64	4m 13s
dist_macos_x86_64	4m 27s
dist_windows	2m 59s
doc_api	1m 12s
doc_book	13s
Rustfmt	13s
Build and test the deno example	54s
Run js-sys crate tests	2m 14s
Run native tests	1m 48s
Run wasm-bindgen crate tests with multithreading enabled	1m 39s
Test TypeScript output of wasm-bindgen	1m 6s
Run UI compile-fail tests	4m 34s
Run wasm-bindgen crate tests (unix)	7m 38s
Run web-sys crate tests	4m 31s
Run wasm-bindgen-webidl crate tests	2m 11s
test_examples	2m 32s
deploy	1m 6s
	1h 3m 1s

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