feat(tree): replace sidebar tree (react-aborist) with custom tree implementation (#2199)

* feat(tree): replace react-arborist with custom tree implementation

* feat(tree): keyboard arrow navigation between rows

* feat(emoji-picker): focus search input on open

* refactor(emoji): switch to @slidoapp/emoji-mart fork for accessibility

* feat(tree): Home/End and typeahead keyboard navigation

* feat(tree): roving tabindex and * to expand sibling subtrees

* feat(tree): Space activation and ARIA refinements

* fix(tree): move treeitem role to focusable row + aria-current

package.json

@@ -95,7 +95,6 @@
   "packageManager": "pnpm@10.4.0",
   "pnpm": {
     "patchedDependencies": {
-      "react-arborist@3.4.0": "patches/react-arborist@3.4.0.patch",
       "scimmy@1.3.5": "patches/scimmy@1.3.5.patch"
     },
     "overrides": {