The complex regex-based detection was based on Ember CLI's implementation, which is necessarily generic and needs to auto-detect the name. In our case, we know the name of the plugin so we can just pass it in - no need for dynamic detection. This resolves issues when there are other files in the `discourse/plugins/{name}` directory which are sorted before `discourse/`
This allows plugins to colocate component JS and HBS under `/plugins/{name}/assets/javascripts/discourse/components`.
`discourse-presence` is updated to use this new pattern, which also serves as an integration test for this part of the build pipeline.