Simplest GitHub Page

Test of simplest GitHub page, leveraging Jekyll without Jekyll.

Goals

Without using Jekyll, Ruby or Gem, leverage the various files that allow you to use markdown directly within github pages.
Pages should largely look the same when rendered from the GitHub repo page and from the git
Leverage the default Jekyll Primer theme's CSS without the using the full theme.
Support internal anchor link tags

Copy these files in this repo to your own github
In your repo, turn on github pages for 'master'
Do not select a theme.
Edit the _config.yml with your own info
Edit the /_layouts/default.html file to change default html template.
Add to /_layouts/default.html template any inline styles you wish to override.

This technique will force Github to default to the CSS used by the Primer Theme, which is is the default Github theme if you do not select a theme, however, note that this theme is not among GitHub's standard theme choices, so you can't return to it if you pick a different theme.
I've not been able to get the _posts feature to work without using Jekyll itself. The supposedly should work, but doesn't.
You can create other _layouts/ templates, and have pages use them by adding this yaml frontmatter to the top of the page:
```
---
layout: templatename
---
```
You can have pages that will not be rendered as web pages by adding this yaml frontmatter to the top of the page:

  ---
  published: false
  ---

Github will render raw URLs as links, but you must use proper markdown construction [linkname](link) for URLs to display propery in the Web View.
If you do a relative link to a markdown file without the extension, it will be rendered in html correctly, for example relative ./sample. Unfortunately, when rendered in Github the relative link will give a 404 error. To preserve compatiblity of both, if use use the .md extension in the relative link — it will render correctly in both html and gihub and both will function as links to the correct place, for example see ./sample.md. You do not need to do this with / which will render README.md as index.html

HTML Components such as Buttons (for instance Link Button & Small Link Button will render as buttons on in the WebView, but as links in the GitHub view. More information on other HTML components available at https://primer.style/css/components
HTML Divs such as boxes can be useful in Web View, but don't display in GitHub. The can be make to look acceptable in both using tricks like a blockquote tag. More information on other HTML divs such as boxes available at https://primer.style/css/utilities/box-shadow

Box Header

Box body text, such as the quick brown fox jumped over the lazy dog.

A Box Button Link

You can display a github avatar {% avatar ChristopherA %} in the Web View but is ugly in the Github View.