Fixes#235
## Description
A GUI Project for the packet inspector
## Test Plan
Steps:
1. Start (any) server
2. Start the proxy `cargo r -r -p packet_inspector_gui --
127.0.0.1:25560 127.0.0.1:25565`
3. Join server (127.0.0.1:25560)
4. Magic
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## Description
<!-- Describe the changes you've made. You may include any justification
you want here. -->
I've used the popular `owo-colors` library to colourise the output of
the `packet_inspector`.
This makes it a lot easier to see who's sending what for debugging
purposes.
In future, I'd like to be able to filter out common, low-information
packets like `SetPlayerPosition` and `KeepAlive` as well, but that's not
in this PR.
## Test Plan
No tests - just eyeball 😄.
Adds `tracing` to `valence_protocol` so we can log debug info about
partially decoded packets. `packet_inspector` has been set to print log
messages at the debug level.
