Include Documentation markdown in releases

[thestonefox]

The release build process currently doesn't build the new documentation folder into the release.

Also, the Documentation folders and all markdown files will need Unity .meta files.

Create a Unity Project with Malimbe as an asset, Unity will create the .meta files for commit.

Also, update the package.json in Malimbe to include the Documentation directory

https://github.com/ExtendRealityLtd/Malimbe/blob/9cf1ed090fc33ef1e64de3ade406b1f1f21942c1/package.json#L25-L33

"files": [
        "*.md",
        "*.meta",
        "Editor",
        "Runtime",
        "Documentation"
    ],

Does "Documentation" need to look back in the parent directory? "../Documentation"?