refactor(v1): recatalog MVP primitives and atoms

[egdev6]

Goal

Recatalog and migrate MVP components that should live as primitives or atoms under the V1 taxonomy.

Components in scope

Initial candidate list from MVP:

• Avatar
• Badge
• Button
• Checkbox
• Chip
• Divider
• Icon
• IconButton
• Input
• Link
• LottieAnimation
• Progress
• Skeleton
• Slider
• Spacer
• Switch
• Text
• TextArea
• Time

The inventory issue may promote or demote items before implementation starts.

Work

• Split primitive-level wrappers from composed atoms when needed.
• Ensure each component exposes a Stack-and-Flow API, not a third-party primitive API.
• Prefer native HTML/ARIA for primitives.
• Use third-party primitives internally only when they materially improve accessibility or behavior.
• Keep styling, tokens, variants, tests, and Storybook conventions consistent.

Acceptance criteria

• Folder structure matches the approved V1 taxonomy.
• Public exports are named and stable.
• Tests pass for every moved component.
• Stories still render in light and dark mode.
• Deprecated paths or aliases are documented if needed.