Feature request: pass a state to be loaded when instantiating plugin

[mqtthiqs]

Our plugin has some non-parameter state that assigns the declared parameters to real audio parameters. At its default state, no assignments are set up, so there is really no point testing anything, making pluginval useless for us.

We'd really like to use your tool! It would be awesome to have a CLI option to load a blob as the initial state of the plugin. Thanks in advance for your consideration :)