Consistent underscoring, prepend non-argument types with (_)

[shahzadlone]

Part of #1750

Consistent underscoring, prepend non-argument types with (_)

While doing #1749, the issue of non-underscored docID/docIDs mixing with underscored _docID became more prominent. Consider:

query {
    User(docIDs: ["bae-6a6482a8-24e1-5c73-a237-ca569e41507d"]) {
        _docID
    }
}

query {
    Users {
        Name
        _docID
        _version {
            docID
        }
    }
}

Request: ` {
    commits(groupBy: [docID], order: {docID: DESC}) {
        docID
    }
}`,
Results: []map[string]any{
    {
        "docID": "bae-f54b9689-e06e-5e3a-89b3-f3aee8e64ca7",
    },
    {
        "docID": "bae-72f3dc53-1846-55d5-915c-28c4e83cc891",
    },
},

After the discussion the solution reached was to make all non-argument types _ underscored and leave the argument types without underscore. So the following would still remain valid:

query {
	User(docIDs: ["bae-6a6482a8-24e1-5c73-a237-ca569e41507d"]) {
		_docID
	}
}

So this issue is for the task to essentially add the underscores to all these from the SIP (https://github.com/sourcenetwork/SIPs/pull/15/files):

NOTE: dockey from above is now docID. So it will change to _docID after this issue.