Documentation

[Chris Friedt]

We should have a couple of different forms of documentation.

1. README.md - targeted mainly at developers. Additional .md files may be appropriate here and there.
2. ReStructuredText (.rst) - mainly for generating HTML / API docs. This should follow upstream Zephyr conventions (e.g. .rst for sample applications, libraries, etc). TBH, documentation generation is a sorely missing topic in the example-application

• Add whatever skeleton is necessary to generate .rst, including a title page, links to the Apache Thrift project, graphics, perhaps some Doxygen, etc.
• Add a documentation build stage to CI

For each new sample application, please ensure that a .rst file is included

GanttStart: 2022-08-20
GanttDue: 2022-09-05