Allow examining furniture to convert to appliances

[anothersimulacrum]

Summary

Interface "Allowing converting terrain/furniture to appliances through interaction"

Purpose of change

It's a little silly to deconstruct a piece of furniture, then put it back up in the same place to turn it into an appliance - let's just directly turn them into appliances with an examine.

Describe the solution

Add a new iexamine actor for converting terrain/furniture to appliances. Move some functions from construction.cpp to veh_appliance.cpp for reuse in other things that place appliances (such as the examine action here).
Add examine action to all the appliances I could find with a furniture equivalent.

Testing

Walk around, examine furniture, watch in awe as they turn into appliances before your eyes.
Put up appliances using the construction menu, and note that it still works.

Additional context

I can't give ovens this action, because they also have the fireplace action. I am unsure how to resolve this.

[I-am-Erk]

Is it possible to make this iexamine only show up if you've already built something attached to a power grid nearby, to prevent it being annoying when you're out looting and wanting to interact with things?

[anothersimulacrum]

I'm not sure exactly of the workflow that would result in this triggering often during looting (but it may just be how I play), and I'd rather keep it more discoverable by not having that as a requirement.

It would be easy to do though, and I am willing, I just think it's better for discovery this way and would not get in the way often.

[I-am-Erk]

I'm okay with that waiting to see if people get annoyed. I admit, I still randomly hit 'e' to pick things up quite often so it's partly just that I know I'll accidentally turn fridges into power grids a lot for a while. In a more general sense, if I'm trying to activate something and there's a fridge nearby as there often is, it will prompt a directional input where one really isn't needed, since gridifying a fridge isn't something I want to do very often.

[anothersimulacrum]

I don't know of an easy way to avoid the prompt, even with what I would do to mitigate that there would still be the direction prompt.

[Maleclypse]

Wasn’t there a discussion that ovens needed to lose the fireplace action because they won’t hold a wooden fire without causing irreparable damage? So basically to use it as a fireplace would mean it’s unusable as an oven.