ZIP File System

Allows the user to mount a ZIP archive as a virtual file system in the VS Code Explorer pane by using the Mount context menu item.

To-Do

Add tests

Cache decompressed buffers

Implement write actions

Ensure tests run in the prepublish script

They do in the latest VS Code extension template for sure, so maybe update this codebase to match the new template?

Use the vscode.workspace.fs provider instead of the fs dependency

This is to support working with archives from virtual file systems not just disk.