Add support for nested CSS in ts, js and tsx #3600

Job	Run time
Test Linux (latest stable Rust)	2m 14s
Output Regression Test	2m 32s
Check Linux Packaging	1m 57s
Actionlint	18s
Test with MIME database	1m 59s
Test x86_64-unknown-linux-gnu	2m 8s
Test x86_64-unknown-linux-musl	2m 46s
Test aarch64-pc-windows-msvc	2m 24s
Rustfmt	20s
Typo Check	12s
Test x86_64-pc-windows-msvc	2m 24s
Test aarch64-unknown-linux-gnu	3m 26s
Test x86_64-apple-darwin	7m 31s
Test aarch64-apple-darwin	2m 47s
	32m 58s

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