feat(chip): migrate Chip to MD3 tokens and Reanimated

- rework Chip around a dedicated tokens.ts (colors/sizes) and utils.ts
  (was helpers.tsx), replacing legacy RN-core Animated with Surface's
  Reanimated-driven elevation
- add trailingIcon prop independent of onClose, plus M3 assist/filter/
  input/suggestion example variants
- wire up hover-driven elevation, focus rings (chip body + trailing
  icon), and focus-outline darkening
- fix disabled+selected chips losing their filled background, and
  trailing-icon-to-label spacing using the touch target instead of the
  icon's own size

Author: k0ndee

docs/6.x/docs/guides/migration.md

@@ -80,6 +80,28 @@ You can specify a `testID` explicitly and use that value to query the component.
 
 ## Components
 
+### Chip
+
+#### Default mode
+
+- The default **`mode`** changed from **`"flat"`** to **`"outlined"`**.
+
+```tsx
+// Before (v5) - no mode passed, rendered flat
+<Chip onPress={() => {}}>Example Chip</Chip>
+
+// After (v6) - no mode passed, renders outlined; pass mode="flat" to keep the old look
+<Chip mode="flat" onPress={() => {}}>Example Chip</Chip>
+```
+
+#### Removed props
+
+- **`compact`**, **`showSelectedOverlay`** were removed and have no direct equivalent.
+
+#### New props
+
+- **`trailingIcon`** / **`onTrailingIconPress`** / **`trailingIconAccessibilityLabel`** add a trailing action (e.g. a dropdown) independent of the close button. `trailingIcon` takes precedence over `onClose`'s close icon when both are specified.
+
 ### Appbar
 
 The `style` props for `Appbar` and `Appbar.Header` no longer accept `Animated.Value` or `Animated.AnimatedInterpolation`. They only accept static styles.

docs/public/gallery/chip-dark.png

@@ -51,10 +51,7 @@ export const screenshots = {
     enabled: 'screenshots/checkbox-enabled.ios.png',
     disabled: 'screenshots/checkbox-disabled.ios.png',
   },
-  Chip: {
-    flat: 'screenshots/chip-1.png',
-    outlined: 'screenshots/chip-2.png',
-  },
+  Chip: 'screenshots/chip.png',
   DataTable: 'screenshots/data-table-full-width.png',
   'DataTable.Cell': 'screenshots/data-table-row-cell.png',
   'DataTable.Header': 'screenshots/data-table-header.png',