docs: add TypeScript section to application generator page

.lycheeignore

@@ -26,3 +26,7 @@ https://expressjs.com/sitemap-index.xml
 
 https://coveralls.io/-*
 
+# Exclude OpenJS Foundation Slack invite — redirects to a rotating Slack
+# invite token that returns 403 to bots; the vanity URL itself is valid
+https://slack-invite.openjsf.org.*
+

src/content/docs/en/4x/starter/generator.mdx

@@ -123,3 +123,17 @@ The app structure created by the generator is just one of many ways to structure
 Feel free to use this structure or modify it to best suit your needs.
 
 </Alert>
+
+## TypeScript
+
+The `express-generator` tool scaffolds a JavaScript application. If you prefer to start from a TypeScript codebase, the community-maintained <a href="https://github.com/seanpmaxwell/express-generator-typescript" target="_blank" title="express-generator-typescript on GitHub">`express-generator-typescript`</a> project offers an equivalent generator that produces a ready-to-run TypeScript project:
+
+```bash
+$ npx express-generator-typescript myapp
+```
+
+<Alert type="info">
+
+`express-generator-typescript` is a third-party project and is not maintained by the Express team.
+
+</Alert>

src/content/docs/en/5x/starter/generator.mdx

@@ -123,3 +123,17 @@ The app structure created by the generator is just one of many ways to structure
 Feel free to use this structure or modify it to best suit your needs.
 
 </Alert>
+
+## TypeScript
+
+The `express-generator` tool scaffolds a JavaScript application. If you prefer to start from a TypeScript codebase, the community-maintained <a href="https://github.com/seanpmaxwell/express-generator-typescript" target="_blank" title="express-generator-typescript on GitHub">`express-generator-typescript`</a> project offers an equivalent generator that produces a ready-to-run TypeScript project:
+
+```bash
+$ npx express-generator-typescript myapp
+```
+
+<Alert type="info">
+
+`express-generator-typescript` is a third-party project and is not maintained by the Express team.
+
+</Alert>