WebAssembly should support handling runtimeconfig.json

[akoeplinger]

See #37535 (comment)

[marek-safar]

Could you clarify why? We'd need to copy the files to the temp file system and add all the baggage for handling the json logic which is not necessary for self-contained setup.

I think a better approach is to add the configProperties section which is probably the only relevant part for self-contained configs to csproj PropertyGroup and handle it during build.

[akoeplinger]

Yeah I was imprecise when creating the title, I don't think we need to necessarily read the file as part of the WASM process but we need to handle it somehow rather than just ignoring it.

[radical]

I think a better approach is to add the configProperties section which is probably the only relevant part for self-contained configs to csproj PropertyGroup and handle it during build.

Do you mean - read the configProperties section of the runtimeConfig.json, and add it to the build, so that we don't have to support reading runtimeConfig.json itself in the wasm app?

[marek-safar]

We should just leverage the runtimeConfig.json task we have for mobile AOT for WASM AOT