refactor(aria/grid): Add accessors for pattern properties

Author: adolgachev

src/aria/grid/grid.ts

@@ -77,6 +77,18 @@ export class Grid {
   /** The wrapping behavior for keyboard navigation along the column axis. */
   readonly colWrap = input<'continuous' | 'loop' | 'nowrap'>('loop');
 
+  /** The currently active cell. */
+  readonly activeCell = computed(() => this._pattern.activeCell());
+
+  /** Whether the user is currently dragging to select a range of cells. */
+  readonly dragging = computed(() => this._pattern.dragging());
+
+  /** Whether the focus is in the grid. */
+  readonly isFocused = computed(() => this._pattern.isFocused());
+
+  /** Whether to pause grid navigation. */
+  readonly pauseNavigation = computed(() => this._pattern.pauseNavigation());
+
   /** The UI pattern for the grid. */
   readonly _pattern = new GridPattern({
     ...this,