folder for sections

[shawnthompson]

@michael-n-cooper, thoughts on creating a folder to put all the section in to separate them from the root files?

Putting all these files in their own folder:

<section id="abstract" data-include="abstract.md" data-include-format="markdown"></section>
<section id="sotd" data-include="status-of-this-document.md" data-include-format="markdown"></section>
<section data-include="introduction.md" data-include-format="markdown"></section>
<section data-include="key-terms.md" data-include-format="markdown"></section>
<section data-include="closed-functionality.md" data-include-format="markdown"></section>
<section data-include="text-command-line-terminal-applications-and-interfaces.md" data-include-format="markdown"></section>
<section data-include="comments-on-conformance.md" data-include-format="markdown"></section>
<section data-include="comments-by-guideline-and-success-criterion.md" data-include-format="markdown"></section>
<section data-include="comments-on-definitions-in-wcag-2.2-glossary-in-appendix-a.md" data-include-format="markdown"></section>
<section class="appendix" data-include="success-criteria-problematic-for-closed-functionality.md" data-include-format="markdown"></section>
<section class="appendix" data-include="background-on-text-command-line-terminal-applications-and-interfaces.md" data-include-format="markdown"></section>

I can put in a PR for it, if you agree.

[michael-n-cooper]

It's ok by me, whatever will work well for the group!