chore: add themes to the core build workflow

Author: brandyscarney

.github/workflows/actions/build-core-stencil-prerelease/action.yml

@@ -29,4 +29,4 @@ runs:
       with:
         name: ionic-core
         output: core/CoreBuild.zip
-        paths: core/dist core/components core/src/foundations core/css core/hydrate core/loader core/src/components.d.ts
+        paths: core/dist core/components core/src/foundations core/css core/themes core/hydrate core/loader core/src/components.d.ts

core/scripts/testing/scripts.js

@@ -49,16 +49,16 @@
   const paletteQuery = window.location.search.match(/palette=([a-z]+)/);
   const paletteName = paletteQuery?.[1] || 'light';
 
-  // Only attempt theme loading if not using CDN and theme is valid
+  // Only attempt theme loading if the theme is valid
   if (themeName && ['ionic', 'ios', 'md'].includes(themeName)) {
     loadThemeTokens(themeName, paletteName);
   }
 
   async function loadThemeTokens(themeName, paletteName) {
     try {
-      // Load theme tokens
+      // Load the default tokens for the theme
       const defaultTokens = await import(`/themes/${themeName}/default.tokens.js`);
-      let theme = defaultTokens.defaultTheme;
+      const theme = defaultTokens.defaultTheme;
 
       // If a specific palette is requested, modify the palette structure
       // to set the enabled property to 'always'