refactor(cli): config refactor

[imhoffd]

• Config class replaced with a function that returns a readonly object
• deleted unused properties
• resolveNode now just uses require.resolve with most statements changed to resolve to root of packages using each package's package.json

[imhoffd]

@ptitjes Would you be able to review/test the changes around resolveNode? It is possible to use require.resolve if we use <pkg>/package.json as the resolving point for the root of a package. It also works for resolving any JS files within the package. My biggest concern is with getFilePath. Do you remember why this is using resolveNode? The function seems to be for joining paths of non-JS files within a plugin's directory. I don't understand why the code within the path.startsWith('node_modules') if-block is necessary.

[jcesarmobile]

Added a minor comment.

Also, the way for users to configure the android studio path was windowsAndroidStudioPath and linuxAndroidStudioPath. The PR seems to remove those config options (so breaking change? should be documented?).
In open.ts it's still mentioned that you should use them, so texts should be updated for the new way of configuring them.

And in capacitor.config.json the plugins object appears the first one, since it can grow a lot if users add a lot of configurations, the other values would be hard to find, probably better to print the plugins object the last

[imhoffd]

I didn't mean to break the Android Studio path stuff at this time, so I fixed it. But I think we should change it before the final release.

Fixed the plugins appearing first in some cases. 👍