Add direct installation links

[CodyCBakerPhD]

fix #595

Though, @garrettmflynn, is there a way you can remove the vX.Y.Z part from the file names? That's the only thing preventing us from using the latest tag and never having to update this to get it to work for latest releases (which I just know is going to slip up one day)

[garrettmflynn]

Yep! We can add this to the build property of the package.json file: artifactName": "NWB-GUIDE-${arch}.${ext}". Apparently ${arch} and the leading dash will be removed if not present (e.g. for non-M1 Mac builds).

[CodyCBakerPhD]

Yep! We can add this to the build property of the package.json file: artifactName": "NWB-GUIDE-${arch}.${ext}". Apparently ${arch} and the leading dash will be removed if not present (e.g. for non-M1 Mac builds).

Coolio; we'll confirm that once next release is cut and update docs to match at that point and it should be taken care of automatically thereafter