Add Chip atom component

- Interactive tag for filtering, selection, and dismissible labels
- Wraps MUI Chip with FA tokens: 12 component tokens (height, padding, font, icon sizes)
- Two variants (filled/outlined) × two colours (default/primary) × two sizes (sm/md)
- Custom `selected` prop promotes to brand colour with warm bg (outlined)
- MUI theme overrides: soft tonal fills, branded outlines, hover/focus states
- 10 Storybook stories including interactive filter and removable tag demos
- Preflight passed all 5 checks

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

docs/memory/token-registry.md

@@ -225,3 +225,22 @@ the correct token for any design property.
 | badge.iconSize.md | 14px | Badge | Medium badge icon |
 | badge.iconGap.default | → spacing.1 (4px) | Badge | Icon-to-text gap |
 | badge.borderRadius.default | → borderRadius.full (9999px) | Badge | Pill shape |
+
+### Chip
+
+`tokens/component/chip.json`
+
+| Token path | Value / Reference | Used by | Description |
+|-----------|-----------|---------|-------------|
+| chip.height.sm | 28px | Chip | Small chip height |
+| chip.height.md | 32px | Chip | Medium chip height (default) |
+| chip.paddingX.sm | → spacing.2 (8px) | Chip | Small horizontal padding |
+| chip.paddingX.md | → spacing.3 (12px) | Chip | Medium horizontal padding |
+| chip.fontSize.sm | → fontSize.xs (12px) | Chip | Small chip text |
+| chip.fontSize.md | → fontSize.sm (14px) | Chip | Medium chip text |
+| chip.iconSize.sm | 16px | Chip | Small chip leading icon |
+| chip.iconSize.md | 18px | Chip | Medium chip leading icon |
+| chip.deleteIconSize.sm | 14px | Chip | Small chip delete icon |
+| chip.deleteIconSize.md | 16px | Chip | Medium chip delete icon |
+| chip.iconGap.default | → spacing.1 (4px) | Chip | Icon-to-text gap |
+| chip.borderRadius.default | → borderRadius.full (9999px) | Chip | Pill shape |