Vectorize shaders

[JakeSmarter]

Motivation

This is just a precursor to finally fixing the annoying “Image Zoom 🐛”.

Have you read the Contributing Guidelines?

Sure, otherwise I would not be here. 😉

Contribution

This PR vectorizes (thus also optimizes a bit) the fragment shader where applicable. No new functionality has been added.

https://github.com/JakeSmarter/mapillary-js/blob/vectorize_shaders/src/api/provider/GraphDataProvider.ts#L41
The DEFAULT_ENDPOINT could also be a const in the global scope, if that is something you would rather like.

Should non‑texture fragments be
https://github.com/JakeSmarter/mapillary-js/blob/main/src/shader/chunk/map_color_fragment.glsl.ts#L11
transparent black or
https://github.com/JakeSmarter/mapillary-js/blob/vectorize_shaders/src/shader/chunk/map_color_fragment.glsl.ts#L9
rather opaque black?

Btw, I am not a huge fan of hard coding shader sources in the application source code and spreading them over multiple foreign programming language source files, although I do understand that there are some advantages to this approach. However, the biggest downside to this are the lack of overview, proper file management, and correct syntax highlighting. Better use shaderSource(), attachShader(), linkProgram(), and friends. Or, build a single string out of pure shader source files. Just something to think about.

Test Plan

No unit test for shaders. Just run it to see if it works for you. This PR is nothing more than a functional equivalent.

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