docs: Random bug fixes and improvements (#9235)

* Add TabLinks to generated example code

* Open search menu to components from home page

* Scroll current page into view

* Click logo on mobile to go to homepage

* Add links to examples to homepage

* Fix code font size on mobile

* Fix example app code rendering

* Update Autocomplete description

* Make Menu starter API mirror RAC API

* Make grid sizing properties use touch scaling

* Correct copy on getting started page

* Fix toc shifting when scrolling to the bottom

* Align markdown menu to the end

* Fix article resizing

Author: devongovett

packages/@react-spectrum/s2/style/spectrum-theme.ts

@@ -395,7 +395,7 @@ const radius = {
 };
 
 type GridTrack = 'none' | 'subgrid' | (string & {}) | readonly GridTrackSize[];
-type GridTrackSize = 'auto' | 'min-content' | 'max-content' | `${number}fr` | `minmax(${string}, ${string})` | keyof typeof baseSpacing | (string & {});
+type GridTrackSize = 'auto' | 'min-content' | 'max-content' | `${number}fr` | `minmax(${string}, ${string})` | number | (string & {});
 
 let gridTrack = (value: GridTrack) => {
   if (typeof value === 'string') {
@@ -405,7 +405,7 @@ let gridTrack = (value: GridTrack) => {
 };
 
 let gridTrackSize = (value: GridTrackSize) => {
-  return value in baseSpacing ? baseSpacing[value] : value;
+  return typeof value === 'number' ? size(value) : value;
 };
 
 const transitionProperty = {