Re-add IME support #2322

Job	Run time
cargo check (aarch64-android)	25s
cargo check (msrv) (wasm32)	19s
cargo clippy (windows-latest)	5m 15s
cargo check (msrv) (windows-latest)	2m 10s
cargo clippy (wasm32)	2m 0s
cargo clippy (macos-latest)	2m 25s
cargo check (msrv) (macos-latest)	45s
cargo doc	40s
cargo clippy (ubuntu-latest)	3m 9s
cargo check (msrv) (ubuntu-latest)	42s
formatting	28s
Prime LFS Cache	4s
cargo test (wasm32)	25s
typos	6s
cargo test (windows-latest)	4m 41s
cargo test (macos-latest)	1m 48s
cargo test (ubuntu-latest)	4m 44s
	30m 6s

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