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/autism-self-advocacy-skills-aba.md

@@ -70,25 +70,3 @@ Parents play a critical role in reinforcing self-advocacy skills learned in ABA
 - Model Advocacy : Demonstrate how you advocate for your own needs, providing a real-world example.
 
 Teaching self-advocacy through ABA empowers children to take charge of their needs, preferences, and choices. By fostering independence and enhancing communication skills, ABA helps children navigate their environments with confidence and dignity. Whether in therapy sessions or at home, self-advocacy is a gift that equips children for lifelong success.
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- Previous Post 
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-###### [Discover Self‑Care Hacks for Parents of Children with Autism](autism-family-self-care-tips)
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- Next Post 
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-###### [Executive Functioning Skills and Autism](executive-functioning-skills-autism)
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