Plugin source path

The plugin path should be named in a distinctive form for the plugin as it will be used in QGIS for the plugin folder name. For instance, my_super_transformer for My Super Transformer plugin.

Also, use_project_slug_as_plugin_directory can be used to alter this behavior. If the source directory is not at the top level, the project_slug will automatically be used in any case.

Side note, the plugin path shouldn’t contain any dash character.