feat: Export an ESM from core & plugins

[NemoStein]

Feature Request

Description

Currently, bundledWebRuntime outputs a single script with Capacitor functionalities.
As webstandards marches forward and ESM becomes more popular, being able to include Capacitor as a module without a bundler is a step towards the future of the web.

Platform(s)

Web, maybe all others.

Preferred Solution

The same way we can set bundledWebRuntime to copy the bundle to the webDir folder we could have a exportModuleRuntime that would output all modules, possibly each in its own file.

Alternatives

I've tried to copy the node_modules/@capacitor/* dist folders, but it didn't work.
E.g.: @capacitor/filesystem/dist/esm/index.js still uses a bare import