feat(blog): recreate article footer navigation and related posts

- add reusable live-site-faithful blog footer component
- extract previous, next, and related post data from article content
- remove duplicated footer fragments from multilingual articles
- document the repeatable footer extraction workflow

www/src/content/blog/en/asd-sensory-friendly-recipe-thanksgiving-pumpkin-cake.md

@@ -74,25 +74,3 @@ If you have any leftovers, they can be stored for up to 4 days in the fridge or
 This recipe is simple, easy, and delicious! We hope that you encourage your child to help you prepare the cake and have a great time while doing it. Enjoy!
 
 For more information on aba therapy services offered by AIA or to book your free consultation, visit us at [https://www.azinstitute4autism.com](../index), contact us at (480) 707-2195, or email info@azinstitute4autism.com. If you are looking for more applied behavioral analysis and asd diagnosis tips, check out AIA’s clinical director, Rula Diab, monthly [blog posts](../library)!
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-###### [Community Highlights: Meet Rula Diab of Arizona Institute for Autism](community-highlight-meet-rula-diab)
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-###### [Guide: Simple ABA Techniques for Toilet Training Children with Autism](aba-toilet-training-child-autism)
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