Using `opts = {}` when creating plugins with out a `setup.lua.example`

Instead of inserting a commented-out line for the plugin when the plugin doesn't have a `setup.lua.example` I think we should instead just follow `lazy.nvim` documentation to use `opts = {}` that way when installing, if we just want the default configuration for plugins; which I myself tend to go with the default on quite a bit, at least during the first bit of using a plugin. We could also add a configuration `open_config` that defaults to `true` which would still open the file in that case; if you know you want to edit the configuration right away. I'm currently working on a PR for this if it is something you would be interested in.