Add support for nested CSS in ts, js and tsx #3599

Job	Run time
Test with MIME database	1m 56s
Test Linux (latest stable Rust)	1m 54s
Output Regression Test	2m 34s
Test x86_64-unknown-linux-gnu	2m 11s
Test x86_64-pc-windows-msvc	2m 49s
Test aarch64-pc-windows-msvc	2m 30s
Test aarch64-apple-darwin	1m 58s
Test x86_64-apple-darwin	6m 21s
Test x86_64-unknown-linux-musl	2m 42s
Test aarch64-unknown-linux-gnu	3m 22s
Rustfmt	18s
Check Linux Packaging	2m 10s
Actionlint	16s
Typo Check	11s
	31m 12s

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