feat(tvix/tracing): add tracing-tracy support r/8275

This introduces another feature flag, "tracy" to the `tvix-tracing` crate.

If enabled (not enabled by default), it'll add an additional layer
emitting packets in a format that https://github.com/wolfpld/tracy can
display.

I had to be a bit tricky with the combinatorial complexity when adding
this, but the resulting code still seems manageable.

Change-Id: Ica824496728fa276ceae3f7a9754be0166e6558f
Reviewed-on: https://cl.tvl.fyi/c/depot/+/10952
Tested-by: BuildkiteCI
Reviewed-by: Simon Hauser <simon.hauser@helsinki-systems.de>
Reviewed-by: flokli <flokli@flokli.de>

0 files changed, 0 insertions, 0 deletions