feat: sidebar cleanup, updated theme, fixed links

Author: rigor789

.vitepress/config.mts

@@ -1,6 +1,5 @@
 import { defineConfig } from 'vitepress'
 import apiSidebar from '../content/api/sidebar.json'
-import coreSidebar from '../content/core/sidebar'
 import mainSidebar from '../content/sidebar'
 import uiSidebar from '../content/ui/sidebar'
 import nav from './nav'
@@ -38,7 +37,6 @@ export default defineConfig({
     nav,
     sidebar: {
       '/api': apiSidebar,
-      '/core': coreSidebar,
       '/ui': uiSidebar,
       '/': mainSidebar,
     },

.vitepress/nav.ts

@@ -31,7 +31,7 @@ export default [
   {
     text: 'Plugins',
     link: 'https://docs.nativescript.org/plugins/index.html',
-    icon: 'CubeTransparentIcon',
+    icon: 'PuzzlePieceIcon',
   },
   // {
   //   text: 'Best Practices',
@@ -48,13 +48,7 @@ export default [
     text: 'UI Components',
     link: '/ui/',
     activeMatch: '^/ui',
-    icon: 'CubeTransparentIcon',
-  },
-  {
-    text: 'Core Reference',
-    link: '/core/',
-    activeMatch: '^/core',
-    icon: 'CodeBracketIcon',
+    icon: 'RectangleGroupIcon',
   },
   {
     text: 'API Reference',