Fix autolinking / react-native.config.js

[asklar]

Currently react-native.config.js is a bit messy, the file is at the root of the package yet it is really only about the example app.
The example should be put in its own separate package, and the root react-native.config.js should have the required package information so that autolinking can work on different platforms (e.g. Windows requires this after #1617).

The Windows portion of react-native.config.js for the main package requires this data:

module.exports = {
  dependency: {
    platforms: {
      windows: {
        sourceDir: 'windows',
        solutionFile: 'ReactNativeWebView.sln',
        projects: [
          {
            projectFile: 'ReactNativeWebView\\ReactNativeWebView.vcxproj',
            directDependency: true,
          },
          {
            projectFile: 'WebViewBridgeComponent\\WebViewBridgeComponent.vcxproj',
            directDependency: false,
          }
        ],
      },
    },
  },
};

[asklar]

@chrisglein @chiaramooney FYI

[asklar]

Should also update the docs: https://github.com/react-native-webview/react-native-webview/blob/master/docs/Getting-Started.md#windows

[github-actions]

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[asklar]

@chiaramooney this should be fixed already right? Can you double check and close this if so?