Fixes for v35 (#1934)

* fix ActioMenu story

* backfill missing exports in root index

* fix package-lock

* add changeset

.changeset/twenty-weeks-battle.md

@@ -0,0 +1,21 @@
+---
+'@primer/react': patch
+---
+
+Surfaced the following components and hooks from the root index:
+
+- Portal
+- AnchoredOverlay
+- useFocusTrap
+- useFocusZone (and types)
+- sx (and types)
+- ConfirmationDialogProps
+
+These exports can now be imported from the root index, rather than from their nested subfolders.
+
+E.g.
+
+```diff
+- import { ConfirmationDialogProps } from '@primer/react/lib-esm/Dialog/ConfirmationDialog';
++ import { ConfirmationDialogProps } from '@primer/react';
+```

docs/content/system-props.mdx

@@ -2,7 +2,7 @@
 title: System Props
 ---
 
-import {PropsList, COMMON, LAYOUT, BORDER, TYPOGRAPHY, FLEX, POSITION, GRID} from '../components'
+import {PropsList, COMMON, LAYOUT, BORDER, TYPOGRAPHY} from '../components'
 
 <Note variant="warning">
 
@@ -32,6 +32,3 @@ For example, if you wanted to add some flex utilities to the `Text` component, y
 | `TYPOGRAPHY` | <PropsList systemProps={TYPOGRAPHY}/> | [styled-system typography docs](https://github.com/jxnblk/styled-system/blob/master/docs/table.md#typography)                                                                                                 |
 | `BORDER`     | <PropsList systemProps={BORDER}/>     | [styled-system border docs](https://github.com/jxnblk/styled-system/blob/master/docs/table.md#border)                                                                                                         |
 | `LAYOUT`     | <PropsList systemProps={LAYOUT}/>     | [styled-system layout docs](https://github.com/jxnblk/styled-system/blob/master/docs/table.md#layout) <br/> [styled-system misc docs](https://github.com/jxnblk/styled-system/blob/master/docs/table.md#misc) |
-| `POSITION`   | <PropsList systemProps={POSITION}/>   | [styled-system position docs](https://github.com/jxnblk/styled-system/blob/master/docs/table.md#position)                                                                                                     |
-| `FLEX`       | <PropsList systemProps={FLEX}/>       | [styled-system flexbox docs](https://github.com/jxnblk/styled-system/blob/master/docs/table.md#flexbox)                                                                                                       |
-| `GRID`       | <PropsList systemProps={GRID}/>       | [styled-system grid docs](https://github.com/styled-system/styled-system/blob/master/docs/table.md#grid-layout)                                                                                               |