Test File Encoding of files

New-ModuleManifest (used for DSC Composite Resource and Modules) use a weird encoding.
It'd be best to catch early to avoid issues (i.e. at least with `git diff`).
This is also true with Test-Kitchen or anything ruby... (needs UTF no BOM)

Start by reproducing the encoding produced by New-ModuleManifest and comparing it with the UTF/no-BOM expectation mentioned for Test-Kitchen and Ruby files. Identify where this repository generates or validates module files, then define the checks and test coverage needed to catch the encoding before it appears in git diff.

Written by the indexing model from the issue text.