Fix: Builds on Windows

[nmn]

Resolves #78

There are three solve issues fixed in this PR:

1. rm -rf doesn't exist on windows. Replaced with rimraf.
2. NODE_ENV=... doesn't exist on windows. Replaces with cross-env NODE_ENV=...
3. Windows will use \r\n for line endings which broke gen-types script. Updated the script to find and replace all \r\n with \n first.

[github-actions]

compressed-size: runtime library

Size change: 0.00 kB
Total size: 2.36 kB

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Filename: gzip (minify)	kB size	kB change	% change
./packages/stylex/lib/stylex.js	1.02 (3.53)	0.00 (0.00)	0.0% (0.0%)
./packages/stylex/lib/StyleXSheet.js	1.34 (3.41)	0.00 (0.00)	0.0% (0.0%)

[github-actions]

compressed-size: e2e bundles

Size change: 0.00 kB
Total size: 1126.06 kB

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Filename: gzip (minify)	kB size	kB change	% change
./apps/rollup-example/.build/bundle.js	1005.35 (9859.49)	0.00 (0.00)	0.0% (0.0%)
./apps/rollup-example/.build/stylex.css	120.70 (870.91)	0.00 (0.00)	0.0% (0.0%)