You shouldn’t need to add files to src directory if you do not want to. Grafana will serve files from the root or from the dist subdirectory if it exists. public/plugins/windstream-table2-panel is the root of your plugin directory or /dist if it exists.
Just to double check, windstream-table2-panel matches the id field in the plugin.json file and editor.html is in the root of your plugin directory?
Below the url path to the worldmap plugin in Chrome Dev Tools. It has plugin id grafana-worldmap-panel.
