Atomic: Phase P2.10 true per-declaration output

[dbanksdesign]

Summary

• Rename hash-only whole-object class naming from atomic to compact (breaking change for users of the old atomic name).
• Implement true atomic mode: one class per CSS declaration with cross-component dedup so CSS size plateaus as the codebase grows.
• Wire decomposition through styles.class, styles.component, and styles.hashClass; document migration and update bundle budget.

Test plan

• npm test in packages/typestyles (331 tests pass)
• npm run build passes with updated gzip budget
• Verify two components sharing color: red emit one CSS rule in atomic mode
• Confirm existing apps using old atomic for hash-only names switch to compact

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