Ortho camera support

[Algorush]

made the first version for orthographic camera support with dummy perspective camera, for review.

[Avnerus]

Hi @Algorush!
Thank you for another contribution. I have some questions about this change:

1. Can you describe your use-case of the orthographic camera?
2. Why does 3D Tiles not work with an orthographic camera?
3. Could this be resolved in three-loader-3dtiles instead? It sounds like it might be an issue with the loader and we could add support for orthographic cameras there, if needed.
4. I took the opportunity now to refresh the CI and test suite. You can now test that a tileset load correctly with npm run test. The build should then pass the CI check.

[Algorush]

1. Can you describe your use-case of the orthographic camera?

Hi @Avnerus! We use Orthographic camera in 3DStreet Editor mode in two projections - for Plan View (view from above on the street), for Cross Section view (side view). You can see it here for example: https://3dstreet.app/#https://streetmix.net/kfarr/3/example-street

Why does 3D Tiles not work with an orthographic camera?

An error occurs when switching to the Orthographic camera related to the math.gl library:

I think this happens because the Ortho camera has different parameters from the Perspective camera, which three-loader-3dtiles uses, for example, it has no FOV. And camera Frustrum for ortho camera is calculated using another function.

Also, I'm sorry, this PR won't work with the standard version of Aframe-inspector for now. To be honest, I published this PR in this repo by mistake. I wanted to publish it in the 3Dstreet/aframe-loader-3dtiles-component repository. Because I applied a temporary solution here by adding the emit cameraChange event to the 3DStreet Editor code: 3DStreet/3dstreet-editor#410
Because as it turns out, the set-camera-active event no longer fires for some reason, here:

aframe-loader-3dtiles-component/index.js

Line 49 in 4e3b36d

this.el.sceneEl.addEventListener('camera-set-active', (e) => {

Thank you very much for the suggestion to add Orthographic camera support to three-loader-3dtiles. I had already did it today, and it works good at first glance.
nytimes/three-loader-3dtiles#157

[Avnerus]

Thank you @Algorush!
Closing this for now and will comment in three-loader-3dtiles.