Fix #104: Display correct protocol name in logs

- Add protocol field to http2Interop struct to track actual protocol
- Use stored protocol name instead of hardcoded 'grpc' in output
- Now http2 mode shows 'http2:' prefix and grpc mode shows 'grpc:' prefix
- Move grpcHeaderLen constant to grpc.go to avoid duplication

chore: update dependencies (#140)

Signed-off-by: kevin <wanjunfeng@gmail.com>

feat: support displaying plain text (#127)

chore(deps): bump google.golang.org/protobuf from 1.32.0 to 1.33.0 (#72)

Bumps google.golang.org/protobuf from 1.32.0 to 1.33.0.

---
updated-dependencies:
- dependency-name: google.golang.org/protobuf
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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Update release.yml (#58)

chore: improve connection statistics (#49)

Update readme-cn.md (#42)

chore(deps): bump golang.org/x/net from 0.6.0 to 0.7.0 (#24)

Bumps [golang.org/x/net](https://github.com/golang/net) from 0.6.0 to 0.7.0.
- [Release notes](https://github.com/golang/net/releases)
- [Commits](golang/net@v0.6.0...v0.7.0)

---
updated-dependencies:
- dependency-name: golang.org/x/net
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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fix: #16 (#21)

chore: update deps