Add AdvantageKit example projects as vendor examples for VSCode extension

[blaze-developer]

When creating a WPILib project, they have a handy vscode extension to generate a project quickly with some simple configurations. It would be really helpful if there could be a modification to that extension, or a seperate extension to create projects with AdvantageKit templates. I think that would make for a very polished experience.

[jwbonner]

The WPILib extension already includes a method for vendordeps to publish example projects, but it is not supported for online vendordeps (which is the primary method for installing AdvantageKit). There have been larger discussions about reworking organization/management of the WPILib example projects used by the extension, and if example projects become supported for online vendordeps we can pursue that option.

In the meantime, downloading a buildable zip from GitHub seems like a reasonable solution that is not significantly more difficult for teams.