Make search result limit configurable

[KKamJi98]

Checklist

• I have read and accepted the contributing guidelines.

Is your feature request related to a problem? Please describe

The built-in search only shows the first 10 matches. When a query has more matches, there is no pagination or way to reveal the remaining posts, so visitors cannot discover older content.

Describe the solution you'd like

Expose a configuration (for example via _config.yml or a dedicated include) so that the limit option passed to SimpleJekyllSearch can be set by site owners, or implement pagination/infinite scroll so users can browse beyond the first page of results.

Describe alternatives you've considered

• Override _includes/search-loader.html locally to pass a higher limit value. This works but duplicates theme code and must be maintained by each site.
• Replace the search with an external service such as Algolia or Elasticlunr, which increases setup complexity.

Additional context

• Chirpy version: 7.3.1 (bundle show jekyll-theme-chirpy)
• The theme initializes SimpleJekyllSearch without overriding its default limit (10) in _includes/search-loader.html.
• Simple-Jekyll-Search documents the default limit of 10 results: https://github.com/christian-fei/Simple-Jekyll-Search/blob/master/dest/simple-jekyll-search.js#L311-L353
• Steps to reproduce:
  1. Build a site with more than 10 posts that match the same query.
  2. Open the search modal and type the query.
  3. Only the first 10 posts are rendered, and there is no option to view additional matches.