parley: add IME support to text editor example #284

Job	Run time
cargo clippy (windows-latest)	3m 44s
cargo clippy (android) (armv7-linux-androideabi)	1m 39s
cargo clippy (macos-latest)	1m 34s
cargo check (msrv) (android) (armv7-linux-androideabi)	58s
cargo clippy (android) (aarch64-linux-android)	1m 35s
cargo check (msrv) (windows-latest)	2m 40s
cargo clippy (ubuntu-latest)	1m 59s
cargo check (msrv) (android) (aarch64-linux-android)	50s
cargo clippy (android) (x86_64-linux-android)	1m 32s
cargo check (msrv) (macos-latest)	1m 0s
cargo check (msrv) (android) (x86_64-linux-android)	52s
cargo check (msrv) (ubuntu-latest)	56s
cargo doc (windows-latest)	2m 50s
cargo fmt	25s
cargo doc (macos-latest)	58s
cargo test (windows-latest)	3m 45s
typos	4s
cargo doc (ubuntu-latest)	1m 9s
cargo test (macos-latest)	1m 26s
cargo test (ubuntu-latest)	1m 45s
	31m 41s

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