Experiment: Use rayon when resolving glyphs #1934

Job	Run time
Prime LFS Cache	3s
cargo check (msrv) (wasm32)	44s
cargo check (msrv) (windows-latest)	2m 2s
cargo clippy (windows-latest)	2m 10s
cargo check (msrv) (macos-latest)	32s
cargo check (aarch64-android)	19s
cargo clippy (macos-latest)	1m 48s
cargo clippy (wasm32)	1m 22s
cargo check (msrv) (ubuntu-latest)	41s
cargo clippy (ubuntu-latest)	1m 38s
cargo doc	21s
cargo test (wasm32)	23s
formatting	21s
typos	4s
cargo test (windows-latest)	2m 30s
cargo test (macos-latest)	1m 22s
cargo test (ubuntu-latest)	4m 7s
	20m 27s

Provide feedback