Update Help Page

[ThadHouse]

We have a help page located at https://github.com/wpilibsuite/vscode-wpilib/blob/master/vscode-wpilib/resources/help.html

Currently it doesn't really have anything other then an image. Scripts and css are not currently enabled, but they can be. Any resources need to be placed in the resources folder, and then accessed with replaceresource/ as the root path. See the current code for an example of how this works.

[auscompgeek]

What sort of things do we want on the help page?

[ThadHouse]

Right now it's just a placeholder. I'm thinking it should have some simple troubleshooting for deploy and build issues, because that page is viewable offline.