Added a "categories" page for further categorization

woadey commented 5 months ago

What does this PR change? What problem does it solve? Creates a new tab for "categories". This allows users to have groupings of posts (sort of like a folder) that can be navigated, rather than having to go through the "posts" tab or the "tags" tab.

Users simply create a folder called "categories" under "content". The _index.md file within the "categories" folder will be used to configure that page.

For creating each category page, just create folders (and their _index.md files) within the "categories" folder like so:

content
└── categories
│  └────  foo/ 
│  │  └────  _index.md  
│  └────  bar/ 
│  │  └────  _index.md  
│  └────  foobar/ 
│  │  └────  _index.md  
│  └────  _index.md

Posts can be assigned to categories just as they would be for tags or keywords:

---
title: 'Example Post'
categories: ["PRs"]
tags: ["new thing"]
keywords: []
---

Was the change discussed in an issue or in the Discussions before? No

PR Checklist

[ ] This change adds/updates translations and I have used the template present here.
[x] I have enabled maintainer edits for this PR.
[x] I have verified that the code works as described/as intended.
[ ] This change adds a Social Icon which has a permissive license to use it.
[x] This change does not include any CDN resources/links.
[x] This change does not include any unrelated scripts such as bash and python scripts.
[ ] This change updates the overridden internal templates from HUGO's repository.