Export work items to JSON in Azure DevOps

This Azure DevOps extension adds a new menu item to the context menu in queries that exports selected work items to JSON format.

How to build and install

• If you don't already have a publisher for the Azure DevOps Marketplace set up, create a publisher.
• Install prerequisites listed here (Node.js and the extension packaging tool)
• Clone the repo
• Edit vss-extension.json and change publisher to your own publisher ID
• Create the extension: in your shell, go to the root directory of the code and run tfx extension create. This should create the vsix file in the same directory
• Publish, share, and install the extension using the instructions here.