Validate all files using PowerQuery parser

[ninmonkey]

This will end up as a GitHub Action as part of the build validation for #7 and #6

minimum viable product, will validate

• ValidateSynacticallyValid - is there a parse error?
• Linter Warnings - not fatal parsing still should show up
• DuplicateIdentifierError:

aliases like this could collide with other queries: Write.Html.pq