add cdn cache plugin (#547)

Author: johnny-woodtke

docs/plugins/overview.md

@@ -78,6 +78,7 @@ This is to ensure developers end up with a performant web server they intend to
 -   [Group Router](https://github.com/itsyoboieltr/elysia-group-router) - filesystem and folder-based router for groups
 -   [Basic Auth](https://github.com/itsyoboieltr/elysia-basic-auth) - basic HTTP authentication
 -   [ETag](https://github.com/bogeychan/elysia-etag) - automatic HTTP [ETag](https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/ETag) generation
+-   [CDN Cache](https://github.com/johnny-woodtke/elysiajs-cdn-cache) - Cache-Control plugin for Elysia - no more manually setting HTTP headers
 -   [Basic Auth](https://github.com/eelkevdbos/elysia-basic-auth) - basic HTTP authentication (using `request` event)
 -   [i18n](https://github.com/eelkevdbos/elysia-i18next) - [i18n](https://developer.mozilla.org/en-US/docs/Mozilla/Add-ons/WebExtensions/API/i18n) wrapper based on [i18next](https://www.i18next.com/)
 -   [Elysia Request ID](https://github.com/gtramontina/elysia-requestid) - add/forward request IDs (`X-Request-ID` or custom)
@@ -118,6 +119,7 @@ This is to ensure developers end up with a performant web server they intend to
 -   [Cap Checkpoint plugin for Elysia](https://capjs.js.org/guide/middleware/elysia.html) - Cloudflare-like middleware for Cap, a lightweight, modern open-source CAPTCHA alternative designed using SHA-256 PoW.
 
 ## Complementary projects:
+
 -   [prismabox](https://github.com/m1212e/prismabox) - Generator for typebox schemes based on your database models, works well with elysia
 
 ---