Remove MDX integration (#1141)

Remove MDX integration to prevent MDX files being used going forward.
Update search to include markdoc files.

Test plan:
- Confirm dev server runs successfully
- Confirm site builds and previews successfully
- Confirm search index includes content from markdoc files

astro.config.mjs

@@ -7,7 +7,6 @@ import rehypeSectionize from '@hbsnow/rehype-sectionize';
 
 // https://astro.build/config
 import vue from '@astrojs/vue';
-import mdx from '@astrojs/mdx';
 
 import markdoc from '@astrojs/markdoc';
 import expressiveCode from 'astro-expressive-code';
@@ -19,7 +18,6 @@ export default defineConfig({
     vue(),
     tailwind({ applyBaseStyles: false }),
     expressiveCode(),
-    mdx(),
     markdoc({ ignoreIndentation: true }),
   ],
   markdown: {

package.json

@@ -12,7 +12,6 @@
   },
   "devDependencies": {
     "@astrojs/markdoc": "^0.11.5",
-    "@astrojs/mdx": "^3.1.7",
     "@astrojs/tailwind": "^5.1.1",
     "@astrojs/vue": "^4.5.2",
     "@babel/eslint-parser": "^7.14.7",

src/plugins/flexsearch.js

@@ -69,8 +69,8 @@ async function createFlexsearchIndexData() {
     .use(remarkExtractSections)
     .use(remarkHtml);
 
-  for (const filepath of await glob.sync('src/content/**/*.{md,mdx}')) {
-    const href = filepath.replace(/(src\/content)|\.(mdx?)/g, '');
+  for (const filepath of await glob.sync('src/content/**/*.{md,mdoc}')) {
+    const href = filepath.replace(/(src\/content)|\.(mdoc?)/g, '');
     const { data: frontMatter, content } = grayMatter(await fs.readFile(filepath));
     const path = [...frontMatter.nav.path.split('/'), frontMatter.nav.title ?? frontMatter.title];