fix: Simplify NameIsInformative and whitelist common top-level domains

[codeofdusk]

Details

This PR combines the Microsoft.*.* and Windows.*.* regexes into one expression, as they're fairly similar, and adds an additional check to pass elements whose names end in common TLDs (i.e. microsoft.com no longer throws an error).

Context

The check remains imperfect, as many of these violations don't start with Microsoft or Windows at all: for instance, this rule would not be able to detect microsoft/accessibility-insights-windows#1438.

Maybe we should change the regex to look for names with, say, at least three or four dots (and not specifically look for Microsoft or Windows at all)?

Pull request checklist

• [n/a] Addresses an existing issue: #0000

[codeofdusk]

Closing in favour of a different approach.