Blazor Support

[wasabii]

I'm convinced we can get SOMETHING working here.

https://learn.microsoft.com/en-us/aspnet/core/blazor/webassembly-native-dependencies?view=aspnetcore-9.0

There are various wasm libc implementations that do things. Like emscripten? Virtual file system.... maybe we can get /lib loading from there? Sure lots of stuff won't work. But basic Java libraries running? Probably.