Implement content search feature

[yabellini]

Implements a content search feature on the website, enhancing user experience by allowing dynamic content search across the site.

• Search Functionality: Adds static/js/search.js implementing search functionality using Fuse.js. This script fetches a search index file, binds the search input to search logic, and dynamically displays search results on the page.
• Search UI Components: Introduces layouts/partials/search.html containing a search input field and a container for displaying search results, enhancing the site's interactivity.
• Integration with Site Layout: Modifies layouts/_default/baseof.html to include the search.js script and the search.html partial, integrating the search feature into the site's main layout.
• Documentation: Adds README.md providing detailed instructions on how to use the search feature and customize the search settings, ensuring ease of use and adaptability for future modifications.

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