Add search functionality to the website

[vietlq]

Check the links

• https://gohugo.io/tools/search/
• http://www.blevesearch.com/news/Site-Search/
• https://matcornic.github.io/hugo-learn-doc/basics/installation/
• https://lunrjs.com
• https://www.npmjs.com/package/hugo-lunr

[tucq88]

Interesting, I'll take this.

[vietlq]

Thanks @tucq88 !