chore: fix @property inherits syntax

[Samantha-Zhan]

What changed / motivation ?

This PR is a quick fix to resolve AtRuleBodyInvalid SyntaxError: Invalid @ rule body error caught in while doing task #799 (see discussion). This is a bug caused by previous PR feat: dynamic styles set inherits to false #794, where we did not include mandatory descriptors syntax and initial-value for @property (see MDS docs @property initial-value syntax).

BEFORE

injectedInheritStyles[fnsName] = {
          priority: 0,
          ltr: `@property ${fnsName} { inherits: false }`,
          rtl: null,
        };
});

AFTER

injectedInheritStyles[fnsName] = {
          priority: 0,
          ltr: `@property ${fnsName} { syntax: "*"; inherits: false; initial-value: "*";}`,
          rtl: null,
};

Linked PR/Issues

Fixes #794

Additional Context

running rollup generate bundle.js with no error: npx rollup --config ./rollup.config.mjs

Pre-flight checklist

• I have read the contributing guidelines
  Contribution Guidelines
• Performed a self-review of my code

[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.ELXrexTJsj /tmp/tmp.9asTYUZCv0

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	562,983	562,983	1.00
· minified	10,185,368	10,185,368	1.00
rollup-example/.build/stylex.css
· compressed	99,229	99,229	1.00
· minified	745,845	745,845	1.00

[necolas]

Good find.

BTW, to run the rollup build in the stylex repo, you can run the relevant worksplace script:

npm run build -w rollup-example

The benefit of doing this is that it wraps the specifics of the script (config path, etc). In general, all scripts within the repo can be called using npm run <script-name> -w <workspace-name> from the root