* Use `tracing::warn!` instead of `error!` when assets not being preloaded
Currently, it emits a `tracing::error` when assets not being preloaded if the dioxus CLI was not used to build the application. It should be a warning since `cargo` can also build the application successfully.
* add more details to desktop preload warning
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Co-authored-by: Evan Almloff <evanalmloff@gmail.com>
