Font loading impacts Windows desktop startup

[jonathanpeppers]

Description

~66ms is spent on my PC just loading fonts:

This was a dotnet new maui template, that has 2 fonts listed.

Speedscope file: PerfViewData.View1.perfView.xml.speedscope.json.zip

Public API Changes

n/a

Intended Use-Case

I think we could cut down the ~66ms spent by some order of magnitude.