feat: exported return types of 'stylex.types.*' fns

[nmn]

What changed / motivation ?

Fixes #857

New types are exported such as stylex.Color and stylex.Length.

These are the return types of the stylex.types.* function. So, for example,

• stylex.types.color("red") is of type stylex.Color<string>

Question

Should the types be under stylex.types instead?

• stylex.types.color("red") would be of type stylex.types.Color<string>

[github-actions]

workflow: benchmarks/size

Comparison of minified (terser) and compressed (brotli) size results, measured in bytes. Smaller is better.

@stylexjs/[email protected] size:compare
./size-compare.js /tmp/tmp.rJ1p3Svw5K /tmp/tmp.L4ysuN50ml

Results	Base	Patch	Ratio
stylex/lib/stylex.js
· compressed	729	729	1.00
· minified	2,541	2,541	1.00
stylex/lib/StyleXSheet.js
· compressed	1,266	1,266	1.00
· minified	3,776	3,776	1.00
rollup-example/.build/bundle.js
· compressed	567,110	567,110	1.00
· minified	10,232,512	10,232,512	1.00
rollup-example/.build/stylex.css
· compressed	100,628	100,628	1.00
· minified	755,718	755,718	1.00