Add custom title / translation of tags (#754)
### Prerequisites
Put an `x` into the box(es) that apply:
- [X] This pull request fixes a bug.
- [X] This pull request adds a feature.
- [ ] This pull request introduces breaking change.
### Description
This PR edits the posts/single layout to use `.GetTerms "tags"` to fetch
a richer model of the tags, and the taxonomy/tags partial to use this
model, instead of just urlizing the tag name, so tags with a custom
title, renders correctly on a post. This also enables translation of the
tags shown on a post.
To show this in action, I've added a translation of the "shortcodes" tag
in the exampleSite into PT-BR, as "Códigos curtos" (my apologies, not a
native speaker, this is what Google Translate said when I gave it "short
codes").
The tag still links to /pt-br/tags/shortcodes/ when viewing PT-BR
content, and to /tags/shortcodes/ when viewing english content. The same
technique can be used to give the shortcodes tag a custom name on the
english page as well.
### Issues Resolved
I had a post with a `C#` tag, which on the post tag list linked to
/tags/c/ resulting in the "404 page not found" page rendering. Based on
[this post on the hugo
forums](https://discourse.gohugo.io/t/slash-in-tag-name/38465) I renamed
the tag to `CSharp`, and added a page for this tag, where I could give
the tag a title of `C#`:
hugo new tags/CSharp/_index.md
with the content;
---
title: "C#"
date: 2023-01-04T11:51:36+01:00
draft: false
---
Now, this renders as `C#` on the tags page, linking to /tags/CSharp/
just fine. However, the tag list on the post itself now showed CSharp
instead of "C#". This PR fixes that.
### Checklist
Put an `x` into the box(es) that apply:
#### General
- [X] Describe what changes are being made
- [X] Explain why and how the changes were necessary and implemented
respectively
- [ ] Reference issue with `#<ISSUE_NO>` if applicable
#### Resources
- [ ] If you have changed any SCSS code, run `make release` to
regenerate all CSS files
#### Contributors
- [X] Add yourself to `CONTRIBUTORS.md` if you aren't on it already
Co-authored-by: Luiz F. A. de Prá <luizdepra@users.noreply.github.com>
