Remove Hammer.js dependency and implement native gesture support

[ChronosSF]

The library currently depends on Hammer.js (hammerjs + @types/hammerjs) for touch gesture support in several components. This dependency is a maintenance burden — it is effectively unmaintained (last release in 2019), requires a separate script tag / import in the consuming application, and needs a custom HammerGesturesManager wrapper in the library core. All the gestures it provides can be replaced with native Pointer Events / Touch Events APIs that are now universally supported in modern browsers.

Affected Components & Events

Component / File	Hammer Events Used
Carousel (carousel/src/carousel/carousel.component.ts)	tap, panleft, panright, panup, pandown, panend
Navigation Drawer (navigation-drawer/src/navigation-drawer/navigation-drawer.component.ts)	swipe, panstart, panmove, panend
List Item (list/src/list/list-item.component.ts)	panstart, pancancel, panmove, panend
Time Picker directive (time-picker/src/time-picker/time-picker.directives.ts)	pan (vertical, DIRECTION_VERTICAL)
Grid Cell (grids/core/src/cell.component.ts)	doubletap
Grid Expandable Cell (grids/grid/src/expandable-cell.component.ts)	inherits doubletap from Grid Cell
Hierarchical Grid Cell (grids/hierarchical-grid/src/hierarchical-cell.component.ts)	inherits doubletap from Grid Cell
Tree Grid Cell (grids/tree-grid/src/tree-cell.component.ts)	inherits doubletap from Grid Cell

Central abstractions to remove / replace

File	Role
core/src/core/touch.ts	HammerGesturesManager service — wraps Hammer Manager lifecycle
core/src/core/touch-annotations.ts	Stripped-down Hammer.js TypeScript interfaces
schematics/utils/dependency-handler.ts	ng-add schematic that installs hammerjs / @types/hammerjs and patches angular.json

Subtasks

1. Carousel — Replace HammerGesturesManager listeners for tap, panleft, panright, panup, pandown, panend with native pointerdown / pointermove / pointerup / pointercancel tracking + a click guard for the tap.
2. Navigation Drawer — Replace swipe, panstart, panmove, panend global document listeners with native pointer/touch event listeners that replicate the drag-open/drag-close behavior.
3. List Item — Replace @HostListener('panstart/pancancel/panmove/panend') bindings with native pointer event handlers implementing the same pan-state machine.
4. Time Picker directive — Replace vertical pan listener with a pointermove handler that tracks vertical delta between pointerdown and pointerup.
5. Grid Cells — Replace the doubletap Hammer event with a native double-click / double-tap implementation (two pointerup events within a short time threshold on the same target).
6. Remove HammerGesturesManager and touch-annotations.ts from core once no component references them; update core/index.ts exports accordingly.
7. Update ng-add schematic (dependency-handler.ts) — remove hammerjs / @types/hammerjs install logic and the addHammerToConfig step; update the schematic options.ts interface (remove addHammer option).
8. Remove hammerjs and @types/hammerjs from package.json peer/dev dependencies.
9. Update tests — remove all Hammer-related test setup (hammerjs import, HammerGesturesManager mocking) from spec files.
10. Update CHANGELOG and documentation — note the removal of the Hammer.js peer dependency as a breaking change and provide a migration note.
11. Create ng update migration schematic — to clean up any import 'hammerjs' lines and scripts entries from consuming application angular.json files.