Figure out windows webview2 distribution about dioxus

[nyrf]

Sometimes we need install application offline, so if there is a way to bundle webview2 into app installer would be great, or bundle application like electron's way?

[ealmloff]

It looks like the tauri bundler exposes options for embedding webview2 in the installer: https://docs.rs/tauri-utils/1.4.0/tauri_utils/config/enum.WebviewInstallMode.html. We now expose this as part of the bundler config

[heyrict]

One remaining issue is that the configuration in Dioxus.toml is not on par with that documented in tauri bundler.
As dioxus uses toml for configuration, the Option<PathBuf> makes no sense in wix.language as we cannot provide a null value in toml. What do you think about reuse tauri_utils::config::WixLanguage, or even the whole tauri_utils::config::BundleConfig directly in our configuration?