fix: workaround for upstream segmented button bad package.json

Author: hperrin

packages/segmented-button/src/Segment.svelte

@@ -35,7 +35,7 @@
 >
 
 <script lang="ts">
-  import { MDCSegmentedButtonSegmentFoundation } from '@material/segmented-button';
+  import { MDCSegmentedButtonSegmentFoundation } from '@material/segmented-button/dist/mdc.segmentedButton.js';
   import { onMount, getContext } from 'svelte';
   import { get_current_component } from 'svelte/internal';
   import type { ActionArray } from '@smui/common/internal';

packages/segmented-button/src/SegmentedButton.svelte

@@ -26,7 +26,7 @@
 </div>
 
 <script lang="ts">
-  import { MDCSegmentedButtonFoundation } from '@material/segmented-button';
+  import { MDCSegmentedButtonFoundation } from '@material/segmented-button/dist/mdc.segmentedButton.js';
   import { onMount, setContext } from 'svelte';
   import { writable } from 'svelte/store';
   import { get_current_component } from 'svelte/internal';

packages/segmented-button/src/ambient.d.ts

@@ -12,3 +12,7 @@ declare namespace svelte.JSX {
     ['onselected']?: (event: CustomEvent<any> & { target: T }) => any;
   }
 }
+
+declare module '@material/segmented-button/dist/mdc.segmentedButton.js' {
+  export * from '@material/segmented-button';
+}