[BRUTEFORCE] Fixes editor crash when using it as plugin

[naomijub]

Addresses issue #191

Creates necessary filesystem when using space_editor as plugin

obs: My initial idea was to store the content as svg and render the svgs with bevy, but bevy and third parties plugins dont support svg as image, so I kept the initial approach and created a file system based on that

[naomijub]

This is a less brute force solution for the problem. However, I seem to be messing the the scheduling of the components #201

[rewin123]

I tested on empty project. Had compilation error

[rewin123]

Looks that error reaises from moving from bevy_egui to bevy_egui_next. I think we need add to CI pipeline chack that space_editor compilates and runs as plugin

[naomijub]

This error is because of the patch, we need to add patch to cargo toml. It is actually in the docs:

# For now it is recomendended to use the following patches of the libraries we are using
[patch.crates-io]
egui-gizmo = { git = "https://github.com/naomijub/egui-gizmo.git" }
bevy-inspector-egui ={ git = "https://github.com/naomijub/bevy-inspector-egui.git" }

we could just retarget them to the repos and once we move to bevy 0.13 remove them

[rewin123]

Editr was compiled after update rust version and add patch in Cargo. But I got infinity loading