feat(nix-compat/wire/bytes/reader): parametrise on trailer tag r/8074

This allows using BytesReader with a custom tag, eg the closing parens
for the NAR reader.

No public constructor is provided for custom-tagged readers, since this
feature isn't public API.

Change-Id: I82e73d064edc4b6783ead1d6fe46a5b35f45c844
Reviewed-on: https://cl.tvl.fyi/c/depot/+/11543
Reviewed-by: Brian Olsen <me@griff.name>
Reviewed-by: flokli <flokli@flokli.de>
Tested-by: BuildkiteCI

0 files changed, 0 insertions, 0 deletions