fix: correct spelling typos in CSS property components

[rubenfiszel]

Summary

Fix spelling typos "overriden" → "overridden" and "overridding" → "overriding" in CSS property components and script helper comments.

Changes

• Fix prop name overriden → overridden in CssProperty.svelte and CssPropertyWrapper.svelte
• Fix prop name overridding → overriding in CssProperty.svelte and CssPropertyWrapper.svelte
• Fix user-facing badge text "Overriden by local" → "Overridden by local" in CssProperty.svelte
• Update prop references in StylePanel.svelte
• Fix comment typo in script_helpers.ts

Test plan

• Open the app editor, select a component with custom CSS, verify the "Overridden by local" badge renders correctly
• Verify global/local CSS override indicators still work in the style panel

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