[feat] tracing support for rust webviews (leptos, yew etc.)

[duncanawoods]

This is a feature offer rather than a feature request!

I have implemented a subscriber layer for passing tracing events created with the standard tracing macros (error!, warning! etc.) and instrumentation to either the tauri_plugin_log endpoint, a tracing specific endpoint and/or the web-console. If interested, I could offer a PR.

Motivation

I use tracing for it's spans, filtering and structured data. I have my own tracing formatters so would prefer not to use log as supported by tauri_plugin_log.

It's possible to integrate tracing and log with tracing-log but it means losing features/support and it has undesirable consequences like forcing execution of all event code even if disabled.

Options

1. If it's not wanted or already exists, you can just close this issue

2. As a feature of tauri_plugin_log allowing a user to switch between tracing and log

3. As it's own tauri_plugin_tracing

   a) as an official tauri plug-in
   b) as an independent crate (is there a naming scheme for unofficial plugins?)

guest-rust

Some plug-ins have guest-js for client integration but I haven't seen the equivalent for rust webview integration i.e. guest-rust which is necessary in this case. This could be as a separate crate or as a feature on the plug-in crate e.g. webview or something. Ideally there is a standardised pattern for this.