Create a style guide and/or templates for this project to support new contributors

[Arielle-Bennett]

Linked to #38 #7 and following discussions on #35, I'd like to suggest creating a style guide and some templates to help new and returning participants successfully contribute high quality content.

Reasons for the style guide and templates include:

• Maintain consistency across different pieces of content
• Help new contributors understand how to format and structure their work
• Highlight less obvious aspects of contributing (e.g. unusual file names, or auxiliary files that also need to be changed when new content is added)
• Support inclusion and diversity efforts by providing accessibility and language guidance

How can people help with this?

• Suggest examples of good style guides
• Create template files
• Help write the style guide
• Provide feedback on the guides and templates
• Update and maintain templates and guides when something changes

[InessaPawson]

Some suggestions for the style guide:

• Follow APA Style for formatting content on the website.
• Not to capitalize the phrase “open source” unless other rules overwriting it. cc @melissawm @noatamir