feat: put resources in appropriate sections

[GitToTheHub]

• Put Config.xml API and Cordova JavaScript API under App Development > References
• Put Data Storage in section Miscellaneous
• Put Plugin.xml API under Plugin Development after section Support a Platform

TOC-Structure App Development

Before	After

TOC-Structure Plugin Development

Before	After

Platforms affected

Motivation and Context

Description

Testing

Checklist

• I've run the tests to see all new and existing tests pass
• I added automated test coverage as appropriate for this change
• Commit is prefixed with (platform) if this change only applies to one platform (e.g. (android))
• If this Pull Request resolves an issue, I linked to the issue in the text above (and used the correct keyword to close issues using keywords)
• I've updated the documentation if necessary