warn if query plugin or mutation plugin are not added

[posva]

[tobyhammett]

I looked into adding this warning, but I wonder if it's really needed. It seems the PiniaColada plugin's current responsibilities are:

• providing any customized options for queries and mutations to be injected with useQueryOptions and useMutationOptions
• installing any Pinia Colada plugins that are configured.

If someone were to use the library without installing the PiniaColada plugin, there would be no custom options provided or plugins installed, but otherwise the library would still function (as long as a Pinia instance is installed, but there is already a warning if Pinia is missing).

Please let me know if I'm misunderstanding the role of the plugin, but I don't think there's much need for a warning about forgetting the PiniaColada plugin since you only need it when you have options to apply and you only have options to apply if you are already installing the PiniaColada plugin.

[posva]

I don't think this is needed anymore, it was at some point.