refactor: replace webgl-layer-framework with webgl-layer module

- Removed the webgl-layer-framework module and its associated tests.
- Introduced a new webgl-layer module to handle WebGL2 layer management.
- Updated references throughout the codebase to use the new webgl-layer module.
- Adjusted layer registration and rendering logic to align with the new structure.
- Ensured compatibility with existing functionality while improving modularity.

public/main.js

@@ -303,7 +303,7 @@ async function checkLoadParameters() {
 async function generateMapOnLoad() {
   await applyStyleOnLoad(); // apply previously selected default or custom style
   await generate(); // generate map
-  WebGL2LayerFramework.init();
+  WebGLLayer.init();
   applyLayersPreset(); // apply saved layers preset and reder layers
   drawLayers();
   fitMapToScreen();