How to publish Edge extensions on the Windows Store?

Question

Since the Windows 10 Anniversary Update I started developing extensions for Edge.

I'd like to publish some of them on the Windows Store however I don't know how. I'm currently sideloading the extension. How do you package it and submit it?

Answer 1

Updated (2017-07-11):

Microsoft rolled out the next stage: It is now possible to submit an extension for review.

Updated (2016-12-19):

Microsoft Edge has published the packaging documentation, and also mentioned the following:

Submitting a Microsoft Edge extension to the Windows Store is currently a restricted capability. Reach out to us with your requests to be a part of the Windows Store, and we’ll consider you for a future update.

Updated (2016-11-21):

According to Building, Testing and Deploying a Browser Extension in Microsoft Edge, which is a session in Microsoft Ignite NZ, if you're interested in deploying your extensions to the Windows Store, please consider submitting a request to https://aka.ms/extension-request to be considered for a future update.

Previous:

Microsoft Edge is not accepting public submissions to the store at this time (Updated on 2016-11-21). See the response from Kyle Pflug (Program Magager of Microsoft Edge):

And from offical FAQ, Microsoft Edge also states that they are intentionally starting with a small set of extensions and the list of extensions is locked, for the reason of reliability, performance and functionality.