Ratty camera protocol

[Nomagno]

Hey!
Ctrl + Alt + O -> Regular orthographic view
Ctrl + Alt + P -> New perspective view ('videogame camera' style)
Basically, both cameras are created at startup, but only the requested one is activated in Bevy. Not sure if this might suppose a performance penalty. I am also not an expert in Rust nor Bevy, so sorry if something's improvable 😅. I also refactored a bunch of match statements into comparisons against is_3d() where I thought it might be reasonable, since 3 long enum values per arm seemed silly once I added the new Persp3d mode (I can revert this if needed).

Additionally:

The ratty graphics protocol is expanded as per the update to protocols/graphics.md, with the corresponding implementation. The rendering and input processing pipeline is reordered in order to allow the applications and the user to control the camera at once harmoniously. I am not a Rust expert, and would, in general, appreciate feedback on the architecture and style.

Missing: better documentation of the code, add support for the features described here to the big rat demo, and perhaps add Ctrl+Alt+[0-9] bindings for manually changing to the 10 camera slots.

Obsoletes #89 and implements #114

[orhun]

thanks for the PR! I have pushed a cleanup commit and have a small question about one of the parts :)

[orhun]

Hey hey! I just fixed conflicts and gave this a try - but I'm not sure if it works as expected.
When I switch to perspective mode, the terminal disappears. But maybe that's expected? I'm not sure.

Do you mind giving this a try with the latest changes here?

[Nomagno]

Sure! Can you confirm if it worked before the merge conflict resolution? Just to have another data point

[orhun]

Hmm maybe I broke it 😅

[Nomagno]

Yep, I can confirm latest commit is broken for me too, but it works before the changes

[orhun]

okay I just ran this from your previous commits and got an idea how the feature should look like. I think something broke while fixing the conflicts, any chance that you could take a look or reimplement this?

[Nomagno]

Sure, I'll have a look!

[Nomagno]

Yeah uhhhh, I'm having trouble merging in a bug-free manner too 😭 hard to believe the branch could've gone stale this quickly, I'll do a more in depth investigation