[Feature Request: log] Expose `chain` method for `dispatch` field in tauri_plugin_log

[tonitrnel]

Motivation

I want to achieve colored text output in the terminal while maintaining clean text in log files.

The existing Builder::dispatch's format method appears insufficient for implementing conditional formatting logic required for this dual-output scenario.

By exposing the chain method of Builder::dispatch, developers could leverage fern to implement custom formatting

Additional context

I previously submitted PR #2451 but had to close it due to missing GPG signature per the Contributing Guide. I can reopen it if needed.

[FabianLars]

I previously submitted PR #2451 but had to close it due to missing GPG signature per the Contributing Guide. I can reopen it if needed.

sure! don't tell anyone but i don't really care about commit signing 🙃

alternatively, would #1130 work for you as well? that was supposed to be merged some time ago but i forgot about it. not sure which approach is better tbh but i feel like 1130 makes it a bit clearer that it's not modifying the main dispatcher?

[tonitrnel]

alternatively, would #1130 work for you as well? that was supposed to be merged some time ago but i forgot about it. not sure which approach is better tbh but i feel like 1130 makes it a bit clearer that it's not modifying the main dispatcher?

I believe the semantics of this PR are more appropriate and fit well with my current use case. Please merge it so that I can implement my code as shown below

Builder::new()
        .format(|_, _, _| {}) // clear default formatter
        .clear_targets() // clear default targets
        .target(Target::new(TargetKind::Dispatch(stdout_dispatch)))
        .target(Target::new(TargetKind::Dispatch(file_dispatch))
        .build()