Implement legacy text alignment #2284

Job	Run time
Test Suite [default features]	1m 32s
Test Suite [std + flexbox]	12s
Test Suite [default except content_size]	1m 34s
Build [debug feature]	12s
Test Suite [std + grid]	14s
MSRV Build [Rust 1.65]	1m 58s
Test Suite [std (no algorithms)]	15s
Test Suite [no features]	15s
Clippy	34s
Documentation	21s
Test Fixture Formatting	18s
Rustfmt	15s
Markdown Lint	6s
Test Suite [alloc + all algorithms]	1m 41s
Test Suite [std + block)]	1m 37s
Test Suite [default + serde]	17s
Test Suite [alloc + no algorithms]	14s
Build Benchmarks	35s
Build Benchmarks (w/ yoga)	52s
	13m 2s

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