feat(react-native): add style-guide.json and Stitch API reference

[ademakdogan]

Follow-up to #47 (closed as a duplicate of #42). As suggested by @davideast in that thread, this adds the extra resources on top of the merged react-native skill rather than duplicating the core skill.

What this adds

• resources/style-guide.json — starter design tokens (colors, spacing, typography, border radii) using React Native-friendly numeric units. Gives the skill a concrete target to sync extracted Stitch values into, instead of hardcoding styles. Brings react-native to parity with the sibling react-components skill, which already ships a style guide.
• resources/stitch-api-reference.md — documents the get_screen metadata schema and React Native-specific mapping rules (density-independent sizing via useWindowDimensions/Dimensions, asset handling through mockData.ts, and mapping the HTML tailwind.config into the style guide / theme.ts rather than merging a web config).

SKILL.md wiring

Both resources are referenced from SKILL.md (the retrieval step points to the API reference; the color-extraction step points to the style guide) so they are part of the generation flow rather than orphaned files.

No changes to the core skill behavior, scripts, or existing resources.

[zachshallbetter]

Hey @ademakdogan! I think I can help you get this merged. The repo was recently-ish restructured to move all skills into the plugins/ directory, which is the cause of your layout conflicts.

To resolve the conflicts, you can run these steps on your branch:

1. Rebase on the latest main:
   git fetch origin
git rebase origin/main

2. Move your added files to their new location in the plugins tree:
   git mv skills/react-native/resources/stitch-api-reference.md skills/react-native/resources/style-guide.json plugins/stitch-build/skills/react-native/resources/

3. Apply your SKILL.md changes manually to the new skill path:
   plugins/stitch-build/skills/react-native/SKILL.md

4. Remove the old SKILL.md and finalize the rebase:
   git rm skills/react-native/SKILL.md git add plugins/stitch-build/skills/react-native/ git rebase --continue

Once committed and pushed, this should clear the merge conflicts!