Add import and export as ESM Modules

[ejgutierrez74]

Increasing Access

I have many problems just importing a class from other file in my sketch. The problem is that p5.js Web Editor doesnt work like all the JS frameworks or code. Also it doesnt show any messages to solve this, only doesnt work and leave the canvas in blank

Feature request details

Use import/export like ESM estandard modules.
You can see an example of code that should work in p5.js Web Editor ( it works fine in Webstorm or VS Code), but doent work. You have to delete the export and import keywords to work properly.
Would be nice that p5.js Web Editor would at least show a messge that import/export doesnt work or suggest to change the code.

https://editor.p5js.org/egutie9/sketches/O_xfapq72

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