Paginated the feed

I have implemented pagination for the feed of all posts displayed on the homepage by editing the index.html file in my main Hugo site directory while following the instructions given on Hugo’s documentation page, as well as overriding the pagination.html file embedded in Hugo with a customised version that follows the layout of post_navigator.html in the original hugo-bearblog repository.

Hopefully this can make the homepage more lightweight so that less loading time is required.