Allow local files (PWA app) in WebView (CORS)

### Description

Hello!

I am not sure if it yet possible or is it just a CORS issue (https://github.com/dotnet/maui/issues/7920)

**The Problem**
I would like to wrap my PWA and use native capabilities.

I create a blank new MAUI native app, with 1 WebView.
I put my local files into Asset folder and then can load index.html into WebView.

But if want to use external javascript files or libs, i get CORS block (request block from https://0.0.0.0).

**Why not MAUI Blazor**
Blazor is a good example of what i can create with HTML/JS/C#, but what if i want to use different frameworks or create my
simple PWA without any overhead.

**PWA in Google Store**
I can publish PWA to Google, but i want to use hybrid app for additional options and i can't publish PWA to IOS (i can, but i need to wrap it again with another toolkits).

### Public API Changes

Allow any requests to local files (shiped in assets folder) in WebView.

### Intended Use-Case

PWA