Create new pages for practices content

[mcking65]

This issue is part of the Restructure repository Project.

In the new content tree, create a page for each section of aria-practices.html that serves as a source of a practices section page in the web site.

[mcking65]

Discussion point: Should we consider having a directory for each practice in the content tree? That would give the option of later having a practice that includes multiple files. It would more closely mirror the structure of the patterns and about branches of the tree.

[mcking65]

#2417 will resolve this issue.

As of today, the practices are moved out of aria-ppractices.html and are in the move-examples branch in a practices subdirectory in the new content tree. All links to practices are updated.

@alflennik, the next steps for practices are:

• Apply css to the practices files in the new content tree
• Put the images for the practices cards into the practice subdirectories of the practices directory
• Build content/practices/practices.html (perhaps in a manner similar to the way the index is built)

[alflennik]

Sounds good @mcking65!