Editor: Added dedicated .eslintrc.json

[ycw]

three.js sticks to ES2018 ... but the editor codebase uses ES2019 and ES2020 features ... so a dedicated eslintrc is needed.

Dynamic import (ES2020):

three.js/editor/js/Loader.js

Line 90 in a980f81

const { Rhino3dmLoader } = await import( 'three/addons/loaders/3DMLoader.js' );

three.js/editor/js/Menubar.File.js

Line 89 in a980f81

const { DRACOExporter } = await import( 'three/addons/exporters/DRACOExporter.js' );

three.js/editor/js/Sidebar.Geometry.js

Line 233 in a980f81

const { GeometryParametersPanel } = await import( `./Sidebar.Geometry.${ geometry.type }.js` );

Optional catch binding (ES2019):

three.js/editor/sw.js

Line 240 in a980f81

} catch {