refactor: refactor font_styles function and add new font style #65

Job	Run time
cargo clippy (windows-2022, stable)	4m 2s
cargo fmt (windows-2022, stable)	27s
cargo build (windows-2022, stable)	4m 2s
cargo test (windows-2022, stable)	7m 12s
cargo clippy (windows-2022, nightly)	3m 7s
cargo fmt (windows-2022, nightly)	43s
cargo build (windows-2022, nightly)	1m 26s
cargo test (windows-2022, nightly)	8m 1s
cargo clippy (macos-latest, stable)	1m 21s
cargo build (macos-latest, stable)	20s
cargo fmt (macos-latest, stable)	7s
cargo test (macos-latest, stable)	1m 33s
cargo build (macos-latest, nightly)	28s
cargo clippy (macos-latest, nightly)	1m 10s
cargo fmt (macos-latest, nightly)	14s
cargo test (macos-latest, nightly)	2m 44s
cargo build (ubuntu-22.04, stable)	18s
cargo clippy (ubuntu-22.04, stable)	1m 26s
cargo fmt (ubuntu-22.04, stable)	5s
cargo test (ubuntu-22.04, stable)	3m 16s
cargo clippy (ubuntu-22.04, nightly)	1m 20s
cargo fmt (ubuntu-22.04, nightly)	13s
cargo test (ubuntu-22.04, nightly)	2m 57s
cargo build (ubuntu-22.04, nightly)	23s
Upload Test Event	0s
	46m 55s

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