add json-ld metadata (#2876)

* add json-ld metadata

* add json-ld metadata

* add json-ld metadata

* add json-ld metadata

* add json-ld metadata

* add json-ld metadata

* add json-ld metadata

* add json-ld metadata

* replace custom properties with additionalProperty

* replace custom properties with additionalProperty

* replace custom properties with additionalProperty

* nit

* update metadata

* update metadata

* update metadata

* update metadata

* update metadata

---------

Co-authored-by: Karim <[email protected]>

Author: aelmanaa

README.md

@@ -25,6 +25,7 @@ npm install && npm run dev
 
 - All docs are markdown and stored in `/src/content`.
 - Navigation is JSON in `/src/config/sidebar.ts`
+- SEO metadata implementation: See [SEO Metadata Guide](SEO_METADATA_GUIDE.md) for technical writers
 
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