Standardize directory structures and naming conventions for supported plugins

[dustinblack]

Please describe what you would like to see in this project

We are seeing a good amount of divergence across the plugins as we take slightly different approaches to organizing files. We should decide on some more standardization, incorporate those standards into the template example plugins, and update documentation to make it clear that the standards are expected.

Please describe your use case

Anyone coming to our official repos should be able to browse through a large number of supported plugins and easily understand the organization and function of files. Adhering to standardization will significantly lower the barrier to entry for new users and contributors.

Additional context